Hello Argjend Dalti - HWG Sababa,
thank you for posting on the Microsoft Community Forums.
No, you cannot use a Windows Server 2022 Client Access License (CAL) with a Windows Server 2019. CALs are version-specific, meaning a Windows Server 2022 CAL is intended for accessing Windows Server 2022, while a Windows Server 2019 CAL is intended for accessing Windows Server 2019.
Hope it helps.
Best regards,
Lei