Maybe ur internet speed?
If that's not the case, then your devices space or other factors etc
I was using chess.com on PC and solved lag issues by changing browsers.
Chess.com support helps people with performance issues. You could open a ticket.
The site can't do something differently with individual accounts.
You might try some of the information in the following articles
https://support.chess.com/en/articles/8652402-how-can-i-optimize-my-online-chess-performance
https://support.chess.com/en/articles/8584209-how-do-i-fix-my-disconnect-lag-issues
Why is it so laggy every time I play chess.com. I'm very annoyed about the lag. Hope you edit my chess.com