Same thing happened while I was updated my editor from ue5 from ue 5.0.3 hotfix.
In project creation panel all template were gone except there were two, recent, blank.
I noticed when epic was updating my UE and cleaning up the process. it somehow removed all the starter content and template pack from previous version. That’s why it wasn’t showing anymore in project creation panel.
Simply from epic launcher in your current engine’s
option panel redownload template and starter content will solve the problem. Before re adding those , It wasn’t there, that’s why project creation panel wasn’t showing those.