I have a Sharp AR-M355N MFP that (as far as I know) is not supported in Gutenprint. The Sharp support site provides drivers for Windows and Linux, but not for macOS later than v10.11. I am requesting the addition of the above printer's driver to Gutenprint.
If nobody who is more experienced in programming has access to this model of machine, I have basic programming skills and would be willing to give development of a driver a try, if others on this forum would be willing to help get me started and give guidance.
Thank you