With my iPhone 8 randomly turning off and then always turning it off, I had it replaced with a new iPhone 13.
I decided not to transfer the full iPhone 8 settings over to the new phone and start (nearly) afresh.
Sometimes I will “clone” my old phone when I have a new one, but most times I like to start from scratch and install the apps I need as and when I need them. This means I don’t install stuff I have stopped using.
What I did do, was copy over my “settings” so I could automatically connect to my known WiFi, use saved passwords and so on.
I configured the phone for multi-factor authentication for work and this was nice and simple.
Overall it was an easy experience moving over to the new phone.