The iPhone 14 Pro Max should be compatible with Zoom. What error message are you getting?
If you’ve already tried restarting your phone, you can try to uninstall and reinstall the Zoom App.
Find the Zoom app icon on your home screen or in your App library
Press and Hold the Zoom icon until a menu pops up.
Tap on Remove App (it will have a red minus sign next to it)
Select Delete App, then tap Delete again to confirm
Restart your phone once the App has been successfully uninstalled
Once the phone is back up, go to the App Store icon
In the bottom-right corner, tap Search.
In the search bar, enter Zoom Workplace
Download the Zoom Workplace App by clickig the cloud icon with the down arrow or “get”
Once the download completes, try to open the Zoom App and see if it works
Should you still encounter issues after reinstalling the Zoom App, I would recommend that you create a tech support case, so one of our tech support engineers can further check and assist.