Swastik3 happened same to me. When i first tried to start a discussion, first 2 discussions aren’t being publically available, maybe those were my first discussions, thats why they aren’t being showed up. But after that. Now my every discussion can be seen moment after i post. According to me, you should wait for some time and then start new discussions.
And also, if you try to post something about bugs or glitches happening with your phone. Chances of being showing is less. Cause nothing team will try reach out to solve the matter without it being publically available.