This is a hypothetical question to those of you who know more about programming than me - I myself amused myself a bit with some little Python years ago but never really learned it. So. The upsurge of touch-screens and on-screen keyboards eliminate the problem of mapping Tengwar fonts onto QWERTY keyboards. Would it be a very difficult task to write a chat app (say, in Python or any other language) that would include a Tengwar keyboard? Or I don't know if any of the existing apps provide the possibility to write a plugin for such a functionality?
Of course it only would add to our problems as it's difficult enough to write in Quenya in Latin let alone in Tengwar, but hey 😊