As tails is loaded via USB drive and your phone can act as a USB drive,.is it possible for your phone to have tails saved and show it when connected as a USB? It would be handy if you had it and other OS available wherever you went by just plugging in your phone.
It’s a shame that it needs to be a smart decide, and can’t just act as a dumb device with an iso.
Perhaps a future build of android will allow it/emulate it/spoof it for this purpose.