ZOOMモバイルでのマイク音量を調整したい

I'm using an Android9 tablet.

Participate in the ZOOM meeting. He uses two tablets of the same type when he participates in meetings with three or more people.

The audio from Tablet A is easy to hear, but the audio from Tablet B is difficult to hear.

AMOB is the same type of tablet, and the same people speak the same way.

I would like to adjust the microphone volume on Mr. B's tablet.