Heya!
I was having the same annoying problem as Gulith421, my game had been working fine and was automatically finding my experiences and loading them via the Front end menus, but then it had stopped finding them even though everything else on my game feature plug-in was still auto loading.
Eventually I discovered if I add my experiences folder to my game feature plug-in list ONLY in my GameFeatureData database: “Asset manager → Primary asset types to scan” then it works! If I list however my same experiences directories both there and also under “Project settings → Asset manager → Primary asset types to scan” then it will no longer find them.
Just thought I’d leave that little comment in case anybody else is on this trail…