An increase in seniority comes with (A) a decrease in hands-on time with technical problems and (B) an increase in time spent on project management, team organization, and people problems.
None the less, there are some possibly interesting resources regarding levels at Honeycomb [1], Netflix [2], and Gitlab [3]. There's a whole book if you're going to venture into "staff" [4]. Last but not least, don't forget the Peter Principle [5].
[1] https://www.honeycomb.io/blog/engineering-levels-at-honeycom...
[2] https://blog.pragmaticengineer.com/netflix-levels/
[3] https://about.gitlab.com/job-families/engineering/developmen...