EFS Certificate Lost After Format – Files Cannot Be Decrypted

Windows installation. I formatted Windows and copied the encrypted
files to an external hard drive before formatting.

After reinstalling Windows and signing in with the same Microsoft
account that was linked to the original installation, the EFS

certificate is no longer available and files cannot be decrypted.
Error: "The specified file could not be decrypted"
Command tried: cipher /d — returned ERR on all files

Important detail: After the new Windows installed, I saw the
Windows.old folder and permanently deleted it using Shift+Delete,
thinking it was unnecessary. During deletion, some files showed
an error saying they could not be deleted. I believe the EFS
certificate (.pfx) may have been inside Windows.old — is there
any chance it still exists on the drive since some files
failed to delete? Can you help recover it?

These files contain irreplaceable personal memories.
Any help is appreciated.
i really really need those files and many files as soon as possible if you know how please help me.