On escapes you need to switch the pins on the jst plug.
Flipsky escs should have the swd port populated as well if I remember right.
Mostly focbox doesn’t have the swd port populated, but it’s not a big thing to open the cover and plug in the male side of the jst plug.
You need to do the same on the wand side too as the swd port isn’t populated there as well.
Took me a while till I could update my wand. Not sure what was the issue, but guess a not so good contact with the pins on the pcb.
Very much hope trampa will make it happen to use the micro USB port in future for firmware updates.