SonicOSX 7.0 is the new SonicWall firewall firmware that allows granular control and enforcement of dynamic Layer 7 applications within the security policy. SonicOSX combines Layer3 to Layer 7 rules into a single rule called Security Policy. Hence, user will no longer need to configure any rules in separate tabs as in the case of classic mode. It also includes multiple improvements around user experience with rule exporting, cloning of a rule, shadowing alerts, bulk editing and many more.
You can find other related KB articles below:
Port forwarding to allow access to a server using SonicOSX 7.0?
How to Block Google QUIC Protocol on SonicOSX 7.0?
Introduction to SonicOS API
https://www.sonicwall.com/support/knowledge-base/introduction-to-sonicos-api/200818060121313/
How To migrate FQDN address objects from a Gen 6 to Gen 7 device using SonicOS API?