See heart rate from Garmin phoenix pro to edge explorer 2

Just got Garmin explorer 2 ,  I have a Garmin phoenix 7 pro watch. I thought both would work in tandem but they don't ... I thought starting cycling exercise in one will start in the other but it does not seems to work. 

Can you pair the watch with the explorer 2?

I tried to find extended display on the explorer 2 , no success I even uninstal my phone...

Same question for the watch heart monitor, can't see it on the explorer 2 ?

Keen to get some help