So, if I added this board to my device, I must be sure to only charge it with a power supply that supports PPS in the 12v range - is that correct?

Thank you, this is a very elegant solution.

That is extremely useful, thank you.

Do I understand correctly that the PD unit is in the USB C plug i.e. can I change the barrel jack connection to the connection on my existing cable?

What’s with dragon and monkey?