SeLi Sorry, if I need ask this but how I can do it. You have some advise?
If you're site is slower on Enhance and the server specs are the same its likely you're not caching the site and you should be. Install proper caching (LSCache if ur using litespeed). This is a good read: https://wpjohnny.com/ultimate-wordpress-speed-optimization-guide/
Mysql optimization will help for uncached pages & content. Enhance uses default MySQL config and its possible your previous hosting used an optimized config. Do NOT copy and paste a conf from someone else. You need to understand what each change you make is. If you search this forum for "MySQL optimization" you will find good tips. Start here https://community.enhance.com/d/970-optimize-the-database/
If caching is being used and configured exactly as before and you site is still slower the issue is NOT the database. In that case either your enhance package has too low resource limit, or something is different such as server specs, CDN disabled, caching config different.
If you're coming from QUALITY optimized hosting, Enhance will be slower out of the box as it uses defaults. You will ned a professional or hours of learning to optimize your server.