IPP integration: expose entity for Epson "maintenance box"

Is it possible for the IPP integration to include an entity for the “maintenance box” on my Epson? It is a percentage based state representing how “used” the ink maintenance box is. The box needs to be replaced when it is fully used, just like an ink cartridge. The printer’s built-in web page shows this alongside the ink status, so I am thinking it might be available to IPP.

My specific printer is XP-8800, but there are many Epson printers with a maintenance box. Basically it’s where the wasted ink goes when it does a head clean and eventually it needs to be replaced.