Push Notification not send

Please provide the following:

  1. SDK Version: 44
  2. Platforms(Android/iOS/web/all): Android/iOS

Hi there

I currently build an app that send push notifications, while developing the application the push notification feature work perfectly , once I deploy the app to my expo account using the command expo publish the push notification was working , but since a few day the push notification feature is not working .

Is that because of the number of the sent notifications ?
What can I do next guys?! Please help

Looking forward to hearing from you guys.
Thank you