NMEA GPS not working

So I’m trying to use my Teseo LIV3F GNSS module with My Drotek Dropix flight controller. I’ve configured the GPS type to NMEA, the baud rate to 38. However no GPS is recognised and using an oscilloscope I can see no data being exchanged between the FC and the GPS. The GPS definitely works as using an FTDI cable I can see the positioning data sending over UART. Is there something I am missing?