I think if you offered a good #XMPP onboarding meaning creating a account, avoiding spam &bots, explaining how to use the account in the myriads of XMPP clients on every platform, handpicking a few and helping the UX of them then you would have success not only users that starts from Prav android app.
I use XMPP since 20 years. There are always features in other services that people would complain not see here.
Problem is quality of clients out there accross all platforms