I like this ! Just a few thoughts.
First, I find the 3 design on the back very jarring. It’s clear why you incorporated it, but a simpler/smoother design might fit better.
Although the capacitive volume and power buttons look great, they would mean turning the phone to locate them. Maybe give the area around them some texture so they could be located by touch ? But I particularly like the fingerprint sensor built into the power button. 👍🏽
The under display camera has been used before and apparently the results are not great, and I don’t find the punch hole that intrusive. Maybe give that one a miss for the sake of clarity ?
Those caveats aside, I think it’s a great design and it would be fantastic if Nothing came out with a phone with these features. The only thing that wouldn’t be fantastic is the resulting rise in price, taking Nothing out of the mid range bracket. But for something truly different, maybe I could scrape together the extra pennies !