Hi.
We had the same issue on all Android Phones (Android Version 9, 10, 11 & 12), turns out, you have to allow MERAKI SM app to install Unknown Apps in order to update the MERAKI SM.
1. Go to the Phone Settings
2. Go into Apps
3. Press the three dots in upper right corner
4. Select Special Access
5. Select Install Unknown Apps
6. Allow MERAKI SM to install unknown apps.
7. Exit to start screen
Go into the MERAKI SM app and update the Configuration Page and you should now be prompted to install MERAKI SM update.
Good luck 🙂