Hi kamranshakir,
Welcome to the Apple Community, where some of us do our best to help each other.
With Zoom, it seems there are frequent updates to the downloaded software, that may be necessary.
(The Zoom website has a lot of info., videos, and how to's that can be very helpful..)
Eg:
Zoom video: How to configure your Zoom meeting audio / video
https://www.youtube.com/embed/-s76QHshQnY?rel=0&autoplay=1&cc_load_policy=1
And
Zoom technical support
https://support.zoom.us/hc/en-us/articles/201362003-Zoom-technical-support
Zoom help centre's "Getting started with iOS" page,
has info. about "Permissions requested by Zoom"
(i.e permissions may need to be given, for Zoom to use microphone and speaker)
https://support.zoom.us/hc/en-us/articles/201362993#h_437ad348-e122-4adf-84ab-4868ca1c0a4b
System and Bandwidth requirements for Zoom on iPad:
https://support.zoom.us/hc/en-us/articles/201179966-System-requirements-for-iOS-iPadOS-and-Android:
Also, seems wise to check the settings for Zoom on iPad, especially after iOS updates
(Permit Zoom to access to camera and microphone.)
Change the iPad settings :
(Scroll to "Find and change other settings")
https://support.apple.com/en-au/guide/ipad/ipad79520415/ios
Sorry not to have any experience with google meet to share.
Hope there's something usegful / helpful to you, here.
Cheers :)