I created a new Experience app to check out what it had to offer, used a random web map that I have created and within the Experience setup I created a mock survey to test that out too.
After a bit of testing, I quit the Experience setup and discovered that there were two new folders in my Content, one named "[nameofmocksurvey]" and "[nameofmocksurvey] 2". The first one just contained the mock survey and since I didn't need it I decided to delete both the folders.
I then discovered (to my horror) that the "[nameofmocksurvey] 2" folder was actually the folder that contained the aforementioned random web map and this folder had somehow been renamed in connection with setting up the Experience app. Has anyone else experienced this automatic folder renaming?
The way I realized that "[nameofmocksurvey] 2" used to be called something else is that there was one map service in it that had delete protection, so the folder still exists, just with the one map service. It used to contain a web map and a web mapping app that is(was) being used by coworkers every day, and all its content. I now have to scramble to try to remake it. I (of course) did not make a backup.
If nothing else, I would just like to encourage everyone to make backups!