Eh, this is a thing, large companies often have internal rules and maximums about how much they can pay any given job title. For example, on our team, everyone we hire is given the role "senior full stack developer", not because they're particularly senior, in some cases we're literally hiring out of college, but because it allows us to pay them better with internal company politics.
My manager gave me a talk about how I couldnt be intermediate because I don't have enough years there. My friend intermediate is about pay and my YOE not about my tenure here (won't be long till I quit)
That really depends on the company. At big tech companies, it's common for the levels and salary bands to be the same for both generalists (or full stack or whatever you want to call them) and specialists.
It also changes depending on market conditions. For example, frontend engineers used to be in higher demand than backend and full-stack.
Just web, which is bullshit cause i literally work with like 3 OSs and 5 programming languages, ci cd. I just get thrown into a random project and come out with solutions. I told my manager my title should be software dev but he disagreed, shucks I guess.