I see that the DJI FPV air units support a 1200mW transmit setting. Is there a way to enable the same for the DJI FPV drone? (Does the current authorization process have a way to unlock higher transmit settings or additional channels? )

( Note: I have my HAM and am authorized to transmit at far higher output than the current 700mW limit. )

Try this: https://b3yond.d3vl.com/ May not work on the current firmware - and DJI disapproves ;-)