The other commenters in this thread seems to be giving you good advice and moral support, so I'm just going to give my input which comes from a perspective that's a bit different.
Sometimes especially when the options we have are contrary to our beliefs, we have to consider if we really need to be a part of it. Sometimes the burden is the smartphone itself. I don't use smartphones and I couldn't be happier, somehow my life didn't end. The last one I had was the N900 and even though it was a pretty cool pocketcomputer, I guess it's now been around 10 years since I last had a smartphone. I don't miss it and especially not when I see other people who have one. It's scary so addictive it seems to be. Pen and paper for data sharing and just calling people can accomplish many tasks.
Old people with bad eyesight also need banking, so I'd hope theres a bank out there who don't require a smartphone. In my country banks use the national id for authentication and you can get a TOTP keychain for the 2FA instead of an app, perhabs similar options exist.
Anyway, I hope you find something that works for you. Life is a process.