My backup is not recognized by iTunes

I had a iPhone 6s with which I created a backup from all my files on the phone and tried to transfer all of it on the my new iPhone 11 Pro Max but the problem is when I try to select backup file name the iTunes does not recognize the backup and as internet says when I go to backup folder on this

path: "[UserName]\AppData\Roaming\Apple Computer\MobileSync\Backup"

there is a folder with same amount of my backup size but the folder has too many empty folders

first of all how to fix this issue.

second is there any software to restore my iPhone 6s (from the phone itself)

thank you in advance and be noticed that there a lot of business matter materials were in phone and that is very important to me to fix this matter.