How though? Create x@gmail.com and copy your old emails into it, change your domain settings to stop pointing to G Suite and forward x@example.com to x@gmail.com instead, cancel your example.com G Suite and your email should still be working....
But then what happens to apps and Android login that are connected to your x@example.com Google SSO login? You can connect this up to x@gmail.com?
At this point you cannot. You will have to create a new Google Account, and none of your purchases will go across.
I'm guessing that whoever signed off on this didn't remember that Google sells movies and Android apps, or else they would've put a FAQ telling people this on the page.