I might have some jealousy thoughts about this too.

When I went through first puberty I grew my boobs for the first time and then it was kind of bullshit to be in the boys locker room, growing boobs and wishing I could wear bras and dealing with all that bullshit and not even knowing what to do. But it happened and I started HRT with like a decent size B cup from those and being fat earlier in my life.

I know they grew because well now I'm wearing DD bras and not falling out of them but I didn't get the "omg omg I have boobs now!" feelings and I feel kinda like I missed out on a trans girl rite of passage or something.