> However, I have some strong FOMO about not being able to learn much technical stuff from my peers or seniors
I work in a team with some very senior colleagues (and even famous in computer circles for a couple of them) in a reputable company. I actually don't learn much from them. They review my code, we discuss some design docs, it's certainly interesting to see how they manage their time and how they deal with various problems, but I don't learn much from them in the technical sense. Also to my surprise, we also don't produce software to the highest standards...
If you want to improve technically, you can read books on things you'd like to improve, or find technical projects outside of work.
I work in a team with some very senior colleagues (and even famous in computer circles for a couple of them) in a reputable company. I actually don't learn much from them. They review my code, we discuss some design docs, it's certainly interesting to see how they manage their time and how they deal with various problems, but I don't learn much from them in the technical sense. Also to my surprise, we also don't produce software to the highest standards...
If you want to improve technically, you can read books on things you'd like to improve, or find technical projects outside of work.