DLP feature is under the Ala Cart Subcription License

Yes it has dlp solutions

DLP solutions will protect one of three areas:
Networks. Network-based DLP solutions like Sangfor Secure Internet Access (SIA) are deployed at the perimeter of your business networks. SIA will scan for any sensitive data that are sent through a variety of communication channels and web applications.
Storage. Other data loss prevention solutions focus on the storage component of your data. Whether it is stored on-premise or in the cloud, these solutions ensure that your data is kept in a secure location and possibly encrypt it without the threat of leaks or vulnerabilities to attacks.
Endpoints. Endpoints are one of the most common sources of data leaks when it comes to file transfers, downloads, printing, etc. An endpoint DLP solution will monitor these actions and alert when potentially suspicious activity is detected.

The Sangfor Data Loss Prevention function is only available in the higher subscription level. If your existing NVAF license does not include it, you can install Endpoint Secure as a workaround.

Sangfor Data Loss Prevention feature is in the other type of higher subcription license. If your current NVAF license does not have it the work around is to add Endpoint Secure

Yes, NGAF has data loss prevention features. You can actually see a guide on their KB.

Data Loss Prevention feature is under the Ala Cart Subcription Licensing of Sangfor.

Here is the link for the Ala Cart Subscription License of NGAF WAFL###-1/2/3/5Y for Data Loss Protection

https://www.sangfor.com/sites/default/files/2022-09/ngaf_br_p_sangfor%20ngaf%20new%20security%20subscription%20bundles_20220907.pdf