Hi jplattet,
Thank you for providing this information on how yo got your printer to print with the Catalina 10.15. I am sure it will help others with the same issue.
While the WorkCentre 3225 driver IS NOT Catalina compliant, I noted that the WorkCentre 3335 driver IS Catalina compliant.
I took a chance, downloaded the 3335 driver and installed it.
It works to print to the WorkCentre 3225. At least on my computer it works.
I used a Windows 10 machine to update the firmware on the 3225 as well, and I updated the firmware BEFORE I installed the driver. For some reason, the firmare update wizard did not appear on the Mac, but did on the WIndows machine.
Good luck!