i know that for my PHONE the galaxy s8 it does have the ANT+ “radio” installed and same thing goes for all the S series up to the recently announced s20 FE.
I don’t know about the tablets though. There were like 6 different model numbers for the TAB S7+ on the samsung website but the one i randomly chose didnt have the connectivity to ANT+
So if you enter your model number under after clicking “mobile devices” and then open up full specs you’ll be able to see what’s what.
But already, not having it show up on the “This is ant” directory probably means it never had it in the first place.
Good luck!