I put /e/OS onto a Galaxy Tab S6 Lite (Wifi only), so an /e/ Tablet is possible/available right now (sort of). It took a bit of fiddling about, but I got there in the end, just under a year ago. It has worked nicely ever since.
I do admit to some concern over the upgrade to the next level of OS, but that is no different than was true for the phone. What is ironic is that to get /e/ onto the GalTab originally, I had to step down the OS to be compatible with what was available at the time 