Is there a SharePoint "modern UI" equivalent to the SP ClientPeoplePicker control? I've seen the Fabric UI control, but that's just the interface component, and doesn't handle user search/resolution.
Or, if one was to build a custom people picker, what's the best approach for resolving users by partial name searches? It seems Microsoft has disabled the ability for external users to get People results back from search, and calling EnsureUser or searching the Profile service requires having the full login ID (doesn't it?).
The people picker calls some kind of user search, but I haven't found any documentation on that service/endpoint.
Edit: It seems that if I need to build a custom one, I should use the