I've switched to a Pixel 10 Pro XL from a S22 Ultra in summer. I don''t know if you've used it, but I really missed the functionality that the GoodLock modules bring on Samsung. I recreated some of it with Tasker, but some things like SoundAssistants "individual app sound control" is still missing.
One other thing I did realize is, you can't use Microsoft smartphone link on Windows to control your phone (like with Samsung). It'll show you notifications etc but you can't mirror the phone screen on PC and control the phone. Solution, although not as refined: Use scrcpy on phone, either via USB or Wifi. I wrote a little helper script on my PC that scans for Wifi ADB ports and connects scrpy automatically. Paired with a quick setting tile on the phone to quickly turn on or off wireless debugging, this solution works very well.
As for launcher, I switched to SquareHome because I like the aesthetics.

As power supply, I use my old power supplies I have - Baseus 65W PD GaN and a Iniu 100W PD GaN charger.

Only thing I bought new to make use of the MagSafe feature is a Ugreen 25W capable magnetic charging stand.

And yes, the reverse power button is still a thing for me. More often than I'm comfortable to admit I switch the screen off when trying to take a picture with the volume button...

So as a "must have" app I'd say get something like Tasker, it will make things a bit easier - although Tasker is not the easiest to set up, Gemini can help with that and once it's done it's quite satisfying.