Replace fan/light/nightlight and go from 3 separate switches to 2 - 1 for night light and 1 combined for light /fan
Success! I pulled the junction box switches and found there were 5 black wires tied together and 4 white ones tied together. I left the white ones alone and when I explored the 3 switches, I had the normal hot into the switch and switched hot leading up to the ceiling. One switch was wired the opposite way (switched hot in) and hot out - I cannot explain this. After I disconnected all the black wires, I found only 1 of the 5 was hot (one was for another circuit (not switched at the box)). To go to two switches, I eliminated one of the black wires and the middle switch. The nightlight was wired correctly (hot in; switched hot out), so I left it as is. For the combined fan/light switch, I used the last of the 4 black wires (hot) into the switch and then combined the fan/light wires out the other side of the switch, up to the ceiling and the fan unit. I also added the ground from the removed middle switch to the fan/light switch. At the fan, I left it wired as it had been in the photos I shared. Circuit testing verified that I could use the switches as intended and the correct response occurred at the fan.