some history.. Pop os. was compiled from Ubuntu by system 76 specificaly for their own build of laptops and desktops for their business customers, getting it to work on other manufacturers boxes is always difficult.
now if you have the latest version of Pop it will have an ubuntu base with the 5.* kernel, provided system 76 haven't stripped too much out of the original build the drivers should be in the system,
unplug the usb adapter switch off the box and re-boot after it boots up plug in the usb and wait you should get a message installing drivers, and test it,
if this fails then try opening your menu look for the driver manager [may be called additional drivers] open and run the search to set if it can find a better set of drivers
if this fails then try a different Usb wi-fi dongle if you have one [any old one will do to test for other problems]
Bwiz