Is it possible to view the actual 2E license key/code that was entered via the '13 groups of 4 hexadecimal characters'?
CA 2E
When the 2E license keys are entered, they are encrypted within the 2E licensing libraries. Therefore, there is no mechanism within CA 2E to display the actual 2E license keys/codes that were actually entered.
You can use the command YDSPLICPRD (Display Product Licenses) to display the licenses currently installed on your system.
Please refer to KB article Applying license codes using YDSPLICPRD for further details: