mc_: Any updates from your team about RFC8599 implementation?

nothing yet, does vanilla kamailio support it?

or FS?

mc_: vanilla kamailio does not support any push notifications i'm afraid. But Lazedo add pusher to it and it work with legacy firebase. I bet that it shouldn't be hard for him to update kamailio PUSHER_ROLE code

here is some opensips info - blog.opensips.org/tag/push-notification