Good catch on my typo. I was checking AC voltage.
Incidentally, I called Rheem in desperation. They told me it was the gas valve (wiper control), resulting in the top of the unit not getting power, however, this does not explain why I do not get a 24V reading on the transformer.
Going to hope someone has an idea here, otherwise, try Rheem again tomorrow morning, followed by a replacement unit I guess.