did you local save at any point. the latest patch offers you 2 points to save one via starting gane, and the other in game at any point you like.

So world files are in 3 (at least places)

1) Single Player using January 2023 versions and beyond
C:\Users\***\AppData\LocalLow\IronGate\Valheim\worlds_local

2) Single Player using Steam cloud saves here
https://store.steampowered.com/account/remotestorage

3) now Single Player and Multi Player ALSO apparently save to here:
C:\Program Files (x86)\Steam\userdata\yourSteamIDnumber\892970\remote

*** If havent played in over a year? theres a pinned doc..where is my save file... yours is on the .old style pre Hearth n home..
4) OLD STYLE C:\Users\***\AppData\LocalLow\IronGate\Valheim\worlds

Good luck and Skall!