Hello everyone,
I ran into the same challenge while migrating my project to integrate with FCM v1, but I think I've found a solution that might help. Initially, I had problems sending notifications after setting up Google FCM v1 in Azure. However, through a redesign process, I managed to overcome this obstacle.
Instead of relying on templates, I changed my approach by registering on Azure Notification Hub without templates. I then created the notification payload in the new FCM v1 format. Using the SendNotificationAsync method with the FcmV1Notification object, I was able to send and receive notifications seamlessly.
Documentation or information on the migration process, especially regarding the use of templates, did not seem very valuable. Consequently, I opted for this alternative solution.
If you are interested, I would be happy to provide you with more details and help you solve your problem.
Best regards.