If 80% is your code, and you're the one making architectural decisions about it, it's not surprising you're much faster at it.

Being a 10x developer is not about commits, or 0 defects short term. Situational knowledge can also blind you to your actual prowess.

How are you elevating the rest of the team? How easy is it for someone to touch on and improce your code?

If you feel and act as your team is incompetent, they either are incompetent, or will become incompetent.