I had an island that used channels and upon converting to UEFN, all connections to channels were lost. A couple of examples are below. I thought UEFN supported channels, not just event binding.
Repro: Make a level in Creative and add some channel logic
Open from UEFN and convert
Channel logic is gone
EDIT: Everything transferred correctly, I was just not told by the UI that the channel system gets auto-converted to event binding and when that happens the activated device shows the event rather than the activator, so me seeing the triggers show nothing confused me.