DLP for Cloud
As far as i know, Cloud Network Security has capabilities like Quantum the different is only on deployment area. But i just wanna clarify, can Cloud Network Security has DLP Feature?
If yes, it's only protect for Data in Motion? How about Data at a Rest? For example, i have many data on AWS, how and what Check Point solution could protect that necessity?
CSPM (Posture Management) can help you ensure that encrypted storage is configured in such instances.
It's targetted at maintaining compliance and mitigating cloud configuration errors.
Use cases outside data at reset & misconfiguration would require additional solutions such as Cloudguard Network Security as you identified earlier.
Suggest talking with your local SE regarding how to best tackle your requirements in detail.