Adding categories to brand page

We have spent the last few days writing replacement guides for our coffee roaster, however I feel I haven't formatted these in-keeping with iFixit norms.

We have multiple variants of the same model roaster, these are differentiated by the serial number prefix;

• A or B for USB-A connection roasters with removable USB stick storage
• C or N for the Nano 7 and Nucleus Link roasters fitted with USB-C and built in storage
• Latest chassis design with a D or P prefix, more modular, easier to repair.

I cannot see or find an option to create subcategories on the Kaffelogic device page to organize these. Any ideas?