Is there any sort of certification scheme for CUPS? Given that's the standard for Mac and Linux, I'm surprised companies don't make 'CUPS compliant' printers.

Is there any sort of certification scheme for CUPS? Given that's the standard for Mac and Linux, I'm surprised companies don't make 'CUPS compliant' printers. I see a lot of recommendations for Brother printers, but they seem to require quite an involved process to set up.