This was talked about recently on the Discord with the addition of Comments and also another person inquired whether there are notifications for Tasks. Furthermore, this has been discussed a lot of times on the forum, with the biggest post on this being Task notifications , but it has also been discussed in A no-plugin notification system , I Need Mobile Sync + Calendar + Notifications , Android Notifications for specific TODOs and Reminders plugin
In short, native push notifications would be nice, both for mobile and desktop.
In the case of Tasks, I think there should be a notification for both the Scheduled and the Deadline date. But for the Deadline date it probably makes sense to send a notification some time before its reached, since a notification on the same day of the Deadline is probably useless.
In the future, perhaps there could be a “Send notification” toggle for both Date and Datetime properties, so that one can add this feature to any property.
With Comments, its probably going to be more difficult, but as a first implementation if a notification is sent when there is a single message you havent seen, that would be nice