Just to close the loop on this, it must have been some sort of user error. When I got back to it, i turned everything off, put in fresh batteries, and turned on the flash, the receiver, and then the transmitter and it worked. In researching, I found a statement that the camera has to be in single shot mode, but mine did not need to be. I found reference that the camera could not be in Silent Mode, but mine was not. I put the flash into TTL mode. The transmitter seems like it can be in either TTL or Manual.
So all in all, it seems to be working now, and not sure what i did to fix it.
This video was helpful as he has the same units with a Z6. (He more recently said he switched to Godox units but has not done a video)
https://www.youtube.com/watch?v=zD_04tbzANYAs well as this suggestion to use the Intervalometer for shooting some self portraits.
https://www.youtube.com/watch?v=I9DkywuXk4I