my sims 4 saves are gone

@Katydid97

You mention still having the saved games in your Saves folder. If you still have your saved games in your Sims 4\saves folder -
[C:\Users\Username\Documents\Electronic Arts\The Sims 4\saves]

It may be the game isn't reading the save files correctly.

Have you tried renaming your saved game file?

To rename your save, remove the version number. - .ver0 or .ver1 by deleting the .ver1 on the end.

For example:
Slot_00000002.save.ver1

Rename it to:
Slot_00000002.save

You may want to give it a different number if you already have a save 2 in your folder. The game should then recognize the save file again.

-- If you have an old auto save file (Slot_00000001.save) it's safe to delete as the game doesn't use it anymore.

If the above doesn't help, Crinrict has some very useful tips on saved games disappearing:

Save Games disappearing
https://sims4.crinrict.com/en/2014/09/save-games-disappearing/