Yeah... so far, apart from Itch, the only marketplace that seems promising is the Samsung marketplace, but I still need to do more research. I've got time since I'm coding a new engine for my 2D stuff, but it's frustrating since I'm shooting myself in the knee when it comes to visibility.
It's a shame since I really like making games that run on a tablet, phone or Android TV box... It's like the poor mans console development.