problems with encrypted backup and the old device has been sold
If I can’t remember the password for my encrypted backup and i haven`t the old device to make a new backup is possible to use it to restore in a new device
iPhone 14
When you first created an encrypted backup you were prompted to enter a password - twice. However, that could have been years ago; you are only prompted the first time you made an encrypted backup, you will never be prompted again until you go to restore a backup.
When you entered the backup password if you have a Mac and have Keychain enabled you were given the option of saving the password in Keychain (this is the default). So first check Keychain for it→Keychain FAQ
If that doesn’t work you get unlimited guesses, so try to guess what password you might have entered back when. If you are like most people it will be a password that you reused. And to speed up the process click to change the password and you will be prompted immediately.