It would be very useful to have an option allowing to use the form button to add information to an existing row, rather than always creating a new one.
The alternative is clunky as input fields cannot currently be set as “required” outside of a form or an edit page…
If you’re talking specifically about an onboarding experience, I have an example here.
Basically combine a number column with tab visibility, then set an increment button to only appear when all required fields have been filled.
Hi @ThinhDinh yes, I had already implemented onboarding in a similar way. 
I was looking at adding a COVID pre-visit registration and so looking at adding more details into the user’s account. Obviously I can do it the same way, but it’s much less user-friendly than having a clear notice which fields are required, and more conditional object visibility handling. A form button that acts on an existing row would be so much cleaner…
Sounds like you need to use a form button to submit the entries to a log of sorts, and then for each user on the user profile tab, grab the information that was submitted last (multiple relation > single value whole row of “end”) given that your log sheet will always be sorted where latest entries add new row at bottom.
Yes, that works for me. Thanks @Robert_Petitto!