There are opposite answers online. But based on below 3 links:
If your client PCs are merely using domain services from a Windows Server 2022 (such as joining the domain), you do need CALs.
Information below may be some help:
CALs: Each user or device that accesses licensed servers requires a Windows Server CAL (Base CAL). Each user or device that accesses advanced functionality on the licensed server requires the CAL associated with that functionality (Additive CAL). Additive CALs must be licensed in addition to the corresponding Base CALs for access to advanced functionality
you may view Licensing Resources and Documents here: https://www.microsoft.com/licensing/docs/view/Windows-Server
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