Any way to create a relation between the App:Comments sheet and another?

Yes thank you! I was just poking around on other similar threads and found this solution. Note to others this will eat into the number of columns you app can use.

But here’s the exact array formula that works:
=ARRAYFORMULA(IF(‘App: Comments’!A1:F=“”,“”,‘App: Comments’!A1:F))

Source:

Thanks @Darren_Murphy