Google has deprecated the previous method of sending push notifications. It will stop working on June 2024. If you have an already working solution then you only need to update the B4J side. Do make sure that you switched from the service to a receiver on B4A. The new API is (confusingly) named...
The project requires the use of Backendless, mainly for file storage and management; databases.
Considering your response, the notifications feature will be implemented directly with Firebase.
Thank you for your feedback.