We can’t set up staging for this website because it is enormous in size (files-wise) and our hosting account doesn’t support such large storage. We’ve rarely ever had an issue where a plugin or theme update was that poorly done that it broke a major part of the site - but in the rare case it happened, restoring the database and the old version of the plugin/them always reverted the issue. But Themeco has the double whammy of being buggy AND breaking any possibility of reverting back to the prior version.
The layouts work just fine in 5.x and then upon updating to 6.x they are all gone - still listed but with nothing in them. Our hope was that Pro has a diverse enough user base that this would have come up a few times, been investigated, and fixed. But it’s still happening. I guess we can backup and download our templates before the update and then update and try to import them, but that won’t help you fix the issue. That will resolve OUR issue but you’re left with a theme that still destroys its own content upon update.