Login as the user whose passphrase you want to see. Enter the following command in a terminal window:
sudo ecryptfs-unwrap-passphrase ~/.ecryptfs/wrapped-passphrase <enter>
Enter the user’s login password when asked.
You will be see a long string of digits & numbers (hexadecimal). That is the passphrase.
Record it in a safe place for future retrival of data from the home folder if you need to do so.