Power Delivery on FP3

I just stumbled over this product:
and I thought it would be really cool, to use it for my FP3 for fast charging and to run a raspberry pi (because the minimum delivery equals the same as the raspberry pi original one (5V 3A))

In the description it says, that it supports Power Delivery 3.0. Thus, I searched if it is used by Android devices, landed here:
XDA Developers on USB-PD
So it seems some proprietary solutions of fast charging are problematic with Power Delivery. And the Fairphone 3 supports Qualcomms proprietary Quick Charge 3.0. Does this mean Power Delivery won’t work? Has anyone tried it?