As a tech lead (which might be different from a team lead.. you can't be sure), my main goal was to maintain team productivity.
For example, if I observed we are slowed by regressions, I invested time into improving test infrastructure.
Or, I tried to take dull infrastructure tasks that noone really likes to do.
We're a place where coders share, stay up-to-date and grow their careers.
We strive for transparency and don't collect excess data.