What I mean by form controls is creating a form that
1) is not contained to a mobile screen size
2) it can add an adjacent form to add more fields
Like the Access example here.

I tried Dataverse. It would be a great solution if I had more from customization as the example shows. I see very little evidence that Power Platform can create professional relational databases. I guess the only tool for this is Access. Maybe someday, Microsoft will figure out to how migrate it into a cloud app.
Anyway, thanks for your replies. Until Microsoft figures out how to build modern cloud apps, I'll look into Caspio or Airtable or some other solution.