Hello, we wanted to know if it's possible to migrate back to v1 after migrating to v2. The reason for this is we wanted to test out v2 for a short term and switch back v1 since it's important to us that sandbox environment is stable. Thanks!
App Store Server Notifications migrating between v1 and v2 in sandbox
Yes you are free to toggle between v1 and v2 in App Store Connect. Once saved, the change applies to new notifications going forward while existing (already generated or being resent) will retain version they started as.