I have added my Gmail account to the Windows Mail app.
For some reason, the incoming Gmail mail alerts that appear in the lower right corner only pop up when I open the Mail app itself, which defeats the purpose of notifying me. This issue is not present with my Hotmail account that I've also added to the Mail app. This Gmail issue was not present on Windows 10.
- Re-adding the Gmail account and reinstalling the Mail app did not resolve this.
- POP and IMAP are already turned ON in the Gmail browser settings
Try run Windows Update and download and install all updates. Try open Microsoft Store and check for updates. In case problem persists, open start and search for feedback and open the Feedback Hub app and report this issue.