A customer of mine had built a website using the theme editor with TwentyTwo. I wanted to switch to GP, but unfortunately this won’t keep the content built with the theme editor. Is there an easy way to convert this to GP/GB?
Simplest option maybe to simply move that site to Staging, and then switch to GP, and look for what is missing eg. the Header, Footer and maybe the related post section.
All of which can be replaced with the theme / GP Elements.