As best I can find, there’s no logo/mark to indicate compliance with PD3.0, nor for PPS.

If it’s compliant with those, I suspect it’ll be in the documentation.

You’re probably on the right track - they designed this for their devices, will publish what it can do but not claim compliance with a spec they didn’t build specifically too.

In the High Level Design meetings (or equivalent), they probably laid out charging time/performance requirements which included using exsiting commodity tech and general conformance to USB C.

This so any PD compliant charger could charge the laptop, but their own charger would follow it’s own specs.