Hi Tim Bassant,
if you need the GVLK of server 2022, please see Key Management Services (KMS) client activation and product keys for Windows Server and Windows | Microsoft Learn.
If your customer has an Open Value Contract, they should have access to the VLSC. If the keys cannot be found in the VLSC, you may need to contact Volume Licensing Support Info. | Microsoft Learn for further assistance.
Regards,
Lei