For a long time I was far too scared of being excluded from technological society to install this on my only phone, as much as I'd love to. It sickens me that banking apps, and others, depend on proprietary operating systems. What I do instead is have a separate device that I customize to my liking with Lineage, than an iPhone that I keep normal; I have the phone that I actually like to use, then a "normie phone" tha…
I don't have an Android device but surely anything that excludes can just be accessed via web browser? I use my banks mobile website in a mobile browser all the time.
Having said that, most bank apps still work on custom android images. Mine works on grapheneOS.