TPS Drop after Update 1.16.1

I was enjoying it after updating it to 1.16.1. If there are more than 15 players, the TPS drops to 15 and if there are more, the TPS drops to 5. How should I do?

I’m using Paper Build 110.

I used a translator.

how about installing a entitytrackerfixer? that might help for you
and simple-anti mob lag

I’ve already applied two plugins. But lag does not improve.

decrease the mobs spawn rate and set render distance to like 5
btw what processor are you running the server on?