Holybro kakute h7 bt no gps arducopter 4.3

hi guys i am struggling to get gps working with arducopter 4.3 all i am getting is no gps on the dashboard
i am using the maytek m9n 5883 which works fine in inav

things i have tried is swapping rx and tx
tried all different baud rates
tried setting different gps types
tried different serial/uarts

wiring is the same as the pinout on the ardupilot page
https://ardupilot.org/plane/docs/common-holybro-kakuteh7.html

quad is powered up with flight pack flight controller is a holybro kakute h7 bt
any help would be much appreciated

thankyou