Currently whether its a push notification from an app or one in a flow you must specify the recipients to send the notification to.
Please create a way to send a push notification to everyone.
My use case is a power app for:
Our company's news feed.
Everyone that wants to download it can.
We publish updates to a SharePoint list (or I can use a database, whatever will work).
All users get a notification on their phone that new company news is available.
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