got promoted to lead over people who were my peers last month and the part nobody warns you about is approving PRs from people who trained you

Technically I'm supposed to review their code now. One of them taught me the codebase four months ago. I've been over-explaining every comment so it doesn't read as a power move, which is probably its own problem. Still figuring out where 'lead' ends and 'still just a teammate' begins.