When migrating a client off SonicWall, the cleanest way to capture the existing configuration is the tech-support-report. The SonicWall community forum recommends the following CLI sequence:
cli screen length session 2600
cli screen width session 128
show tech-support-report
The first two lines stretch the terminal window so the report isn’t paginated or wrapped; the third dumps the configuration.
Capture the output (your SSH client’s session log is the easiest way) and send it to Uplevel Support. With that in hand we can plan the equivalent configuration on the Uplevel side before the cutover.