I’m also struggling with this. Santa bought me a Galaxy Tab A7 Lite (SM-T220) to replace the Galaxy Tab S2 that I’ve been using successfully for some time. It’s meant as an upgrade, but not so it seems. I need Ant+ for my older PowerTap wheel power sensor. I’ve seen information about attaching an Ant+ dongle, but the Anself device that I had to hand doesn’t seem to pick up the PowerTap wheel (whereas the S2 did, once I installed the relevant Ant+ apps).
I’ve tried the Ant Tester app and it seems happy that I’ve got everything, though I’m not clear whether it tests the dongle. I suppose it could be an issue that I’m having to use a USB Micro to C adaptor to connect the cable?
And a future issue is what to do on longer rides, when I need to connect power to the tablet as well.