Hereflow does not work in Mission planner
I have set it for your reference

I use 3.7 Dev- mission planner

I am using a pixhwk2 blackcube and I have connected hereflow to the can port.
But I need some advice on what doesn’t work.

Also, I want to use an MB1240 Sona Sensor together, and I need help with the setup.

This more of a copter firmware issue than a mission planner issue. Sometimes the admins move the posts but you may want to repost in that section.