OK, first, what i was thinking about powering was a standard 12v input Li-Ion cell charger. My assumption at the time was that there is a wiring configuration in a USB male connector that would tell the PD power bank to output 12v. What I got from these videos is that since the charger does not speak PD configuration, I would need one of the displayed USB PD configuration boards mentioned in all the videos, such as the one made in the video where the PD power bank was used to power the router.
Now another question pops into mind. Are there devices that have the PD configuration software/hardware built in, such as a Li-Ion cell charger that wants 12 v, so that all that would be needed would be a cable with a USB C connector on one end, and a 5.5x2.1 connector on the other, such that when the charger is plugged into the power bank the correct voltage is negotiated, and all is happy, happy.
Right now I am thinking that to serve my configuration the thing to do is to find a charger that will accept the default 5v output from the power bank and accept that since I can not negotiate a higher voltage it will take longer to charge any cells.