Good morning Frank.
I no longer have your image - I overwrote it with a clean Raspbian Buster image and then used John Hayes (k7VE) instructions and Basil Gunn's (N7NIX) scripts to build a working DRAWS Buster image that is fully expanded, shows the UDRC sound device, and runs GPSD / GPSMON / CGPS as well as Xastir, YACC, WSJTX, FLDIGI, and Direwolf.
My DRAWS card has the GPS port on the side sitting above the RPi 3B+ power port.
I do not have an RPI 4.
Edd - KD5M