I followed a this guide which explains how to revert changes with unreal revision control, and this is the result I am getting from powershell.
PS C:\Users\USERNAME\Documents\Fortnite Projects\troofth_gungame> urc p s list
OK: Retrieved 1 project snapshot(s).
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| sequence | message | created_by | created_at |
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| 1 | Initial snapshot | TROOFTH TTV TTOK | 2023-07-11 18:08:08.614682-05:00 |
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PS C:\Users\USERNAME\Documents\Fortnite Projects\troofth_gungame>
Clearly, the problem is not on my end. It shows the initial snapshot made early in July, long before I reformatted my PC, and no changes made after that. I am literally going to cry, I put hundreds of hours into seven different maps that had thousands of concurrent players. I am at a total loss.