In FAANG/larger companies they outline the management track and the staff engineer track. It sounds like you simply want to do the latter - so no, there is nothing wrong or unusual with what you are wanting. The problem is those roles are harder to find and grow into in smaller and even medium companies. Eng pay tops out unless you gain management responsibilities whereas at those large companies they will pay staff…
I could be wrong but it sounds like the OP doesn't even want to be a staff engineer (if my understanding of staff engineer is correct).
https://davidxiang.com/2021/01/19/staff-software-engineer-re...
I'm pretty sure you're still expected to guide other engineers (co-workers/teammates), speak almost as a buffer with management, etc.
If you want to be heads down coding and not dealing with people, I don't think staff engineer is the right track?