Panel Sources via REST API

We are trying to call a Panel Source using REST to add some data, but having issues. All Panel definitions should have associated Business Objects in iMIS Cloud, right? We have 3 panels in particular where this doesn't seem to be the case, and I see you can no longer auto-generate business objects from User defined tables/sources using the "Build All" button that used to exist in iMIS 2017.

Any guidance here?