Links for the setup of a private notification server to avoid using open technologies like discord/telegram/ms-teams and having prying eyes on your system notifications.
First, the NTFY server. This will allow you to connect to YOUR server for push notifications to Android/apple devices with the supplied app from the app store.
Next, using apprise and mailrise, you can convert from an email (or other) to a notification in NTFY, telegram/teams/discord,… so on.
This youtube video has a nice tutorial : https://youtu.be/WJgwWXt79pE
https://github.com/caronc/apprise
https://github.com/YoRyan/mailrise