Why is Gmail not syncing with iPhone?

[dasyshah]

If your iPhone is not compatible with Gmail, make sure that your internet connection is stable. If the speed is low, try disconnecting from the internet and resetting your router. If the speed is fine, you can use another device to check your email. If you can't connect to your iPhone's servers, the problem is with your browser. If you have a stable internet connection, you can access your emails on your iPhone.

See also - https://emailspedia.com/gmail-troubleshooting-and-sync-issues/