Years ago I used to love playing around with roms on my phone on XDA and it worked OK. I don't know what folks use these days. But as recently as a few years ago I merely rooted my phone and I couldn't use a lot of apps, not just banking, but even some games.
It's crazy how locked down the ecosystem is.
There are tools to make your device appear to every app as running in a non-rooted environment. Here[1] is a tutorial on how to bypass Google/Samsung Wallet detections. There are threads for different apps and it will quickly turn into a cat and mouse play when Playstore app itself updates, but as the phone is rooted, someone will continue to find a way to bypass attestations and will post a comment on Reddit or XDA explaining how to do it.
[1] https://old.reddit.com/r/Magisk/comments/1lxbdpw/tutorial_ge...
Thanks! I'll look into that next time I decide to root my phone.