You will find iPhone backups inside the MobileSync folder on your Windows 11 computer. By default, the MobileSync folder is located on your C drive. The complete path of the MobileSync folder is as follows:
%APPDATA%Apple ComputerMobileSync
If you do not find your iPhone backups on the above path, navigate to the following path:
%USERPROFILE%AppleMobileSync
This is all about how to change iTunes backup location in Windows 11/10.