Kinda sad nobody answering this.
I tested on my backup vps, and uninstall litespeed, switching to nginx cause wp-admin redirect 302 indifinitely, didn't know what cause this, re-add site also same results, now my site stuck with wp-admin redirect
The page isn’t redirecting properly
An error occurred during a connection to www.example.com
This problem can sometimes be caused by disabling or refusing to accept cookies.
reinstall wordpress also cause it stuck, guess need to reinstall whole aapanel to use it again.
For now I think there's no way to switch litespeed to nginx safely, anyway, I decided to drop free WAF, not worth the trouble.