Honestly, currently I don't have any plans to do that, as I don't consider these devices to be popular choice for LibreELEC. But now that I think a bit, they could be considered as portable movie players.
However, I don't have any of them, but if there is enough interest, something can be arranged. Maybe you can make another thread with poll to see how much interest there is?
Maybe I will do a poll on the pine64 forum, probably there is more people interested in the pinetab.