I could order 500 sheets of trespa today and not be asked what it was for, this is also used in cladding and has fr and non fr grades.
These are now very install friendly and rather than bespoke size, engineered sheets, they are bought at standard size and cut to suit on site. The supplier may simply receive a request for a price for Xm^2 and have no involvement in the design. Or they may. We don't know yet.