As with scrat_squirrel answer.

sudo apt-get install qt5-assistant 

That actually was found for my raspberry pi4 running on a uname of

"Raspbian GNU/Linux 12 (bookworm)" and apt-get found the qt5 assistant meaning qmake was installed but without network, gui, and core. So I found this post and scrat_squirrels post and tried the install:

sudo apt-get install qtbase-dev

and poof! my PixyMon was able to build with only a few warnings....nothing fatal anymore. Thanks for this thread and posts my PixyCam seems to build all the scripts.