Collaboratot column type not in app form

I am missing the collaborator column type fields in the page type form in a universal app. This field is crucial for adding new items in my table.
Is this not supported on purpose or is that a bug?

Either way, can this be added /fixed or am I just not seeing it?

The feature will be added in version 4.4.

In previous versions, collaboration list of the base is not loaded for security reasons (for example, if you build a custom portal app, you don’t want the users can see each other). In version 4.3, there will be an option to choose whether to load collaboration list depends on your own use cases. After this feature, in version 4.4, we will also add the collaborator column support in app form page.