❔ Blazor Binding question

Given the Screenshot i have build something that doesnt work propperly. I am pretty sure its just what i am doing wrong - the left part shows where the item component from mid is created and the item is set - in the center the State property is what is my issue. If i set it (after the constructor) via SetState, to be seen on the right side, the ui doesnt update. i think its because it is a "deep binding" what i do in the center part. But as my experience in Blazor is limited, i am unsure on what would be the propper solution. Just calling StateHasChanged in the center part i think would work, but i dont think this is the correct approach. i hope someone here has insight on how to do this the right way