I broke my phone a few days ago and it’s in getting repaired. However I can say that the days I’ve been without my phone have been great. I haven’t had to do anything with it and I’ve been just not looking at the screen all day. Sure there’s been trouble especially when I got logged out of work stuff that required 2fa but for the vast majority it’s much better than having a phone. Even just when first waking up or on lunch I don’t need to be looking at a phone the whole time there.
I tried looking up to see if I could make a feature phone work but I don’t think so. Really the only things I need a phone for are mostly the apps on it so buying one of those probably wouldn’t work at all. There’s also other “dumb” phones that try fill this niche like lite phone but those are very expensive for what it is.
In the end however I need to improve how I use my phone and control when I use it. Make sure I’m using it as a tool rather than reaching for it day to day when I get bored or uncomfortable. The same for simple times like eating lunch or whatever, instead of carrying it around all day just don’t bother bringing it and embrace the boredom a bit. Just do nothing instead.