my wife and i both have pixel 6 pros, she is using the stock os and im using graphene os,
id always get a little bit better battery life (mainly because i shut things off when im not using them) but it was never great. a update came down last week , and shes now getting over double the run time of me, and her phone isnt getting hot whilst running programs.
i wonder if they have limited the cpu to increase battery life.