Hi
Based on research, there is no OOTB service content pack for us to connect to CDM currently. At the present, it only can be used for “PowerApps”. For more detail information about CDM, you can take a look at below article:
PowerApps and the Microsoft Common Data Model
In addition, someone already shared this idea, you can vote and comment on it: Content Pack for Common Data Model (CDM).
Regards,
Xiaoxin Sheng