Migrate all accounts to new server, what to remember?

Hi! We are upgrading our server to a faster one, and we need to move all accounts as well as all configurations etc. I have some worries:

• Will I have to re-issue Let's encrypt certificates?
• What configurations can be transfered, and what can not be transfered?
• Is there any way to show a "summary" of all configurations on a cpanel server? Like: you use this and that config for this and that. You have PHP 7.2 as standard. You use this and that...

Does anyone have a checklist on what to remember during a transfer? Thanks!