Questions about Unity 2D camera setup

Trying to research this and I've found bits and pieces of answers here and there across this sub and the unity forums, but there was nothing asked that answered all of my questions.

I'm trying to setup a pixel perfect camera in Unity. There are tons of tutorials and stuff to do that, that is fine.

My real question is that when you allow the player to be able to change the resolution of the game, how do you handle a the camera in that case? It would seem like when they select a new resolution, you would need scripts to adjust the orthographic size of the camera AND the PPU of ALL sprites? That just seems so crazy to me.

How hard would setting up the camera be down the road after most of the game was implemented? I'm trying to figure out if this is a hard stop for me, because I've been struggling with this for a few days.