Is it ok? Is there something else you recommend instead? I tried nextcloud talk and it was pretty bad. Jitsi was ok but self hosting it looked complicated. FOSS only, of course.
Just so you know you can get push notifications on Jami. Jami has been supporting unified push notification for a while now, but it’s opt-in, some might not opt for it considering reducing privacy a bit, as some actually disable the proxy and some phone specific feature intending to prevent battery exhausting too fast.
For unified push support you can take a look at jami’s article about its unified push support. I use ntfy
BTW.