Here’s the notes for moving from one namecheap hosting to another space yourself while keeping the same domain/settings.

Full backup on cPanel is a lie

A perfect full migration of shared host can only done by namecheap’s customer service. They told you in the doc that you can do a partial migration yourself but it’s not the full picture! Not only the self-service option is more tedious as you have to move the fragments instead processing one big archive file, there is a piece that’s not accessible from the self-service migration route: Calendars/Tasks/Contacts

This means if that ONLY IF you don’t use CardDAV/CalDAV at all, you can do the migration yourself.