i changed distro from popos to fedore 42. i kept /home partition as mount and formatted rest of them but after installation all of the data was gone. I instantly shut it down and booted into Windows 11 on another drive to check using TestDisk. But all the content was replaced by empty folders.
I am not able to help you on the reason why it was removed, but I think you didn’t get your data back because Windows cannot read Linux disks. You may want to try again with a linux distro and testdisk or Photorec (it is what I have used several times in cases like this).