I have an iPhone 6s. I’m in the same boat. Yesterday the capital one app warned me to update as my iOS version is no longer supported. Well, I can’t. I real

I have an iPhone 6s. I’m in the same boat. Yesterday the capital one app warned me to update as my iOS version is no longer supported. Well, I can’t. I really don’t want to get a new phone. I’m considering just going with a feature phone to cut down on screen time…but I’ll need something that supports Authenticator or MFA one time code gen. I’m in the denial phase of the 6 stages of grief with this thing.