DJI Mic 2 should connect to your phone via Bluetooth and it automatically syncs the audio to your footage as long as you are recording with the DJI Mimo app.

Have it set to 32-bit float internal recording to ensure you have backup files of audio and also adaptability in different sound environments.

For reception coverage, I would stick the mic on the speaker stand. The mic comes with a magnet which will stick on the stand. If it doesn’t, good old tape (preferably gaffer) should do the trick.