I bought 2 of R6SF and both of them got bind to T16P V2. I actuary had same trouble with you, and bought another one. Both of them seem would not bind. Trying to update internal module firmware did not work out. But I finally did it with RF Freq. fine tune. It written on Jumper Website
There could be many reasons why it won't bind. Unfortunately, there doesn't seem to be a clear reason.
Did you follow the binding instructions in the Corona R6SF manual?
You might also try to upgrade the Jumper T16 internal multi-protocol module firmware. Here is a link to a video by Joshua Bardwell that outlines the process.