For me, phones have never not been diy repair outside of the ones with parts pairing, on the paired parts. But I know I'm very much the exception to the rule. I have a lot of equipment and experience doing it.
As to the fairphone 5....it's not really a US phone. You'd have to import it and have no warranty with it. Not a good deal for how much they are and what they're specd at.
FYI, as of January 1st 2025 both Oregon and Colorado have banned paired parts in smartphones from being sold there. So that shit practice should be going away. The EU has been doing the same.
They'll be cheap, but weighing more and taking up more space is not that viable of a trade off. Except for hybrid vehicles.