No sound on google meet/ zoom meeting

Hi all I’m using iPad Pro 2021 11inch, the problem I encountered is the mic and speaker become unstable during the google meet/ zoom. It become not responsive ie other can’t hear me and i can’t hear them too. It really put me in hot water as I’m teacher and I need all these working in fine condition.

what I have done

• uninstall and reinstall those apps
• reset the ipad
• i confirmed I’m not muted by others
• internet speed is ok
• i clear all browser cache and cookies
• clean up all apps running background except those I need
• i updated firmware, and all apps too
• at first I thought is google meet problem but zoom meeting having same problem
• I pray before the class start

However Siri works fine (mean the speaker and microphone works fine right ?), and others

just working fine (YouTube, LumaFusion, etc)

kindly assist what should I do. Thanks.