F4V3S Flight controller no UART 6? Tried everything

I am trying to get the uart6 working and it does not show up in Betaflight as if it's not connected but as you can see in the Radiomaster TX12 the rssi shows they are comunicationg with each other? I have never had such a weird thing happen but Joshua Bardwell had his F4V3S smoke on his very first power up for no reason? Defects do happen and I think B-Cube (Angeltoy Store on AliExpress) should resolve my issue and here is the proof!