Since it’s already moving this early, I wouldn’t touch the pages that are doing well too much
I’d go into GSC and find the pages and queries that already have impressions but are sitting just outside the top spots. Those are probably the easiest wins right now
Build more supporting content around those topics, strengthen the internal links into the pages already showing traction, and put your better links there instead of spreading everything everywhere
Then make changes one at a time so you can actually see what helped