I have an 11 pro as my main workhorse. Multiple years old, constantly running the battery to 2 % then charging to 100 and it still lasts all day for me. I feel like the concern I see going on in this thread might be a bit misguided.
If we are sharing anecdotes, my wife and I got iphone xrs same Xmas. She regularly fully discharged hers, whereas I charged mine throughout the day. My phone very very rarely goes below 40 or even 50 percent. After couple of years, her battery life was awful and mine was fine.
Basically, I find individual stories vary, but statistics may show overall trends
My 11 pro was the same way. And then I got a 14 pro.. it has noticeably worse battery life, I suspect in part due to 5G which I have since disabled. I tend to keep it on the charging stand on my desk for video calls as it now has magsafe (or whatever it's called). It's constantly charging to 100% and I'd love to have a way to stop it from charging without having to remove it from the stand like a cave person.