Yeah but this isn't something scalable that can happen regularly as part of your job description. Like most jobs/companies don't have so many low hanging fruits to pick that someone can speed of build by orders of magnitude on a weekly basis. It's usually a one time thing. And one time things don't usually make you a 10x dev. Maybe you just got lucky once to see something others missed.
And often times at big places most people know where the low hanging fruits are and can fix them, but management, release schedules and tech debt are perpetually in the way.
IMHO what makes you a 10x dev is you always know how to unblock people no matter the issue so that the project is constantly smooth saling, not chasing orders of magnitude improvements unicorns.