Can I implement SSO using Kinde on multiple WordPress websites and services using SAML and/or OAuth?

Hi, I'm evaluating Kinde to see if it will fit our requirements of implementing an SSO for WordPress websites and some third party services (like newsletter, support system etc. which supports a SAML based login). We have a set of WordPress based websites (separate/different domains), where each user (i.e. the client) have a unique login, and then there a set of third-party services (like newsletter, support system etc.) that these clients will also have access to. At this moment, the users need to maintain separate login credentials to access all the services (i.e. WordPress website, newsletter, support system). I have attached a rough diagram of the structure we are looking to achieve. There is no public sign-up option, all the users are created manually. Global users (our team) will have access to everything. App (i.e. WordPress website) users will only have access to their own specific app/website and a selective list of those users (usually just one per site) will also have access to the third-party services. Let's say there are 50 unique WordPress websites, is it possible to have a single IdP database, while still allowing a specific user to only access their own WordPress website and the shared third-party services? Thanks.