now the only problem is that I need to

    [StructLayout(LayoutKind.Sequential, Pack = 4)]
    public readonly struct VertexPositionColor(in Vector3 position, in Vector4 color)
    {
        public static unsafe int SizeInBytes => sizeof(VertexPositionColor);

        public readonly Vector3 Position = position;
        public readonly Vector4 Color = color;
    }
    
    public static void InitVma(Vk? vk, Device dev, PhysicalDevice pdev, Instance instance)
    {
        VmaAllocatorCreateInfo allocatorCreateInfo = new()
        {
            vulkanApiVersion = VkVersion.Version_1_3,
            physicalDevice = pdev.Handle,
            device = dev.Handle,
            instance = instance.Handle
        };

        VmaVulkanFunctions functions = default;
        Debug.Assert(vk != null, nameof(vk) + " != null");
        functions.vkGetInstanceProcAddr = (delegate* unmanaged<VkInstance, sbyte*, IntPtr>)vk.GetInstanceProcAddr(instance, "vkGetInstanceProcAddr").Handle;
        functions.vkGetDeviceProcAddr = (delegate* unmanaged<VkDevice, sbyte*, IntPtr>)vk.GetDeviceProcAddr(dev, "vkGetDeviceProcAddr").Handle;
        
        allocatorCreateInfo.pVulkanFunctions = &functions;
        VmaAllocator allocator;
        vmaCreateAllocator(&allocatorCreateInfo, &allocator).CheckResult();
        _allocator = allocator;
        
        ReadOnlySpan<VertexPositionColor> sourceData = new VertexPositionColor[]
        {
            new(new Vector3(0f, 0.5f, 0.0f), new Vector4(1.0f, 0.0f, 0.0f, 1.0f)),
            new(new Vector3(0.5f, -0.5f, 0.0f), new Vector4(0.0f, 1.0f, 0.0f, 1.0f)),
            new(new Vector3(-0.5f, -0.5f, 0.0f), new Vector4(0.0f, 0.0f, 1.0f, 1.0f))
        };

        var vertexBufferSize = (uint)(sourceData.Length * VertexPositionColor.SizeInBytes);

        VkBufferCreateInfo bufferInfo = new()
        {
            size = vertexBufferSize,
            usage = VkBufferUsageFlags.TransferSrc,
            sharingMode = VkSharingMode.Exclusive
        };

        VmaAllocationCreateInfo allocationCreateInfo;
        allocationCreateInfo.usage = VmaMemoryUsage.Auto;
        allocationCreateInfo.flags = VmaAllocationCreateFlags.HostAccessSequentialWrite |
                                     VmaAllocationCreateFlags.Mapped;

        if (vmaCreateBuffer(_allocator.GetValueOrDefault(), &bufferInfo, &allocationCreateInfo, out var bufferVortice, out var _allocation) != VkResult.Success)
        {
            throw new Exception("Failed to create buffer!");
        }
        //let's try converting to silk and cleaning up after
        Buffer buf = new Buffer(bufferVortice.Handle);
        vmaDestroyBuffer(_allocator.GetValueOrDefault(), buf.Handle, _allocation);
        
        VmaTotalStatistics stats;
        vmaCalculateStatistics(_allocator.GetValueOrDefault(), &stats);

        if (stats.total.statistics.allocationBytes > 0)
        {
            //this should NOT be called. Unless you comment vmaDestroyBuffer
            Console.WriteLine($"Total device memory leaked:  {stats.total.statistics.allocationBytes} bytes. " +
                              $"Allocated previously {vertexBufferSize}");
        }

        vmaDestroyAllocator(_allocator.GetValueOrDefault());
    }

    [StructLayout(LayoutKind.Sequential, Pack = 4)]
    public readonly struct VertexPositionColor(in Vector3 position, in Vector4 color)
    {
        public static unsafe int SizeInBytes => sizeof(VertexPositionColor);

        public readonly Vector3 Position = position;
        public readonly Vector4 Color = color;
    }
    
    public static void InitVma(Vk? vk, Device dev, PhysicalDevice pdev, Instance instance)
    {
        VmaAllocatorCreateInfo allocatorCreateInfo = new()
        {
            vulkanApiVersion = VkVersion.Version_1_3,
            physicalDevice = pdev.Handle,
            device = dev.Handle,
            instance = instance.Handle
        };

        VmaVulkanFunctions functions = default;
        Debug.Assert(vk != null, nameof(vk) + " != null");
        functions.vkGetInstanceProcAddr = (delegate* unmanaged<VkInstance, sbyte*, IntPtr>)vk.GetInstanceProcAddr(instance, "vkGetInstanceProcAddr").Handle;
        functions.vkGetDeviceProcAddr = (delegate* unmanaged<VkDevice, sbyte*, IntPtr>)vk.GetDeviceProcAddr(dev, "vkGetDeviceProcAddr").Handle;
        
        allocatorCreateInfo.pVulkanFunctions = &functions;
        VmaAllocator allocator;
        vmaCreateAllocator(&allocatorCreateInfo, &allocator).CheckResult();
        _allocator = allocator;
        
        ReadOnlySpan<VertexPositionColor> sourceData = new VertexPositionColor[]
        {
            new(new Vector3(0f, 0.5f, 0.0f), new Vector4(1.0f, 0.0f, 0.0f, 1.0f)),
            new(new Vector3(0.5f, -0.5f, 0.0f), new Vector4(0.0f, 1.0f, 0.0f, 1.0f)),
            new(new Vector3(-0.5f, -0.5f, 0.0f), new Vector4(0.0f, 0.0f, 1.0f, 1.0f))
        };

        var vertexBufferSize = (uint)(sourceData.Length * VertexPositionColor.SizeInBytes);

        VkBufferCreateInfo bufferInfo = new()
        {
            size = vertexBufferSize,
            usage = VkBufferUsageFlags.TransferSrc,
            sharingMode = VkSharingMode.Exclusive
        };

        VmaAllocationCreateInfo allocationCreateInfo;
        allocationCreateInfo.usage = VmaMemoryUsage.Auto;
        allocationCreateInfo.flags = VmaAllocationCreateFlags.HostAccessSequentialWrite |
                                     VmaAllocationCreateFlags.Mapped;

        if (vmaCreateBuffer(_allocator.GetValueOrDefault(), &bufferInfo, &allocationCreateInfo, out var bufferVortice, out var _allocation) != VkResult.Success)
        {
            throw new Exception("Failed to create buffer!");
        }
        //let's try converting to silk and cleaning up after
        Buffer buf = new Buffer(bufferVortice.Handle);
        vmaDestroyBuffer(_allocator.GetValueOrDefault(), buf.Handle, _allocation);
        
        VmaTotalStatistics stats;
        vmaCalculateStatistics(_allocator.GetValueOrDefault(), &stats);

        if (stats.total.statistics.allocationBytes > 0)
        {
            //this should NOT be called. Unless you comment vmaDestroyBuffer
            Console.WriteLine($"Total device memory leaked:  {stats.total.statistics.allocationBytes} bytes. " +
                              $"Allocated previously {vertexBufferSize}");
        }

        vmaDestroyAllocator(_allocator.GetValueOrDefault());
    }