Where to get IPA files for 32-bit iPad Mini

I have an old iPad Mini (2013 model) that I thought to resurrect as a screen for a Raspberry Pi with VNC Viewer, but when I try to download the app (or any app) via App Store I get an error with "the app is not compatible with your iPad".  I dig a bit and I found that such model has 32-bit architecture and that most apps are no longer supporting those builds.  Is there any place, like an archive, where I can get such 32-bit versions of the apps (mainly VNC, but if I get the change of getting some others, then better)?  If so, how could I install them? For reference, >A **.ipa** file is an iOS and iPadOS application archive file which stores an iOS/iPadOS app.     — Wikipedia