Stalled while driving, "check gauges" light, then crank no start?

Hello, my truck stalled last night while driving slowly through a parking lot. It was driving normally and suddenly I heard the "beep" like when the check engine light comes on, but it was not the check engine light, it was the "check gauges" light. At first, I didn't even know it had stalled, but when I tried to turn into a parking space, I realized there was no power steering, so then I knew it had stalled. I got out my simple code scanner to see if there was a trouble code, but nothing. The owner's manual says that when there is a "check gauges" light it is either an issue with the charging system/voltage, the oil pressure sensor, or the coolant temperature sensor.

Each time I would try to start the truck again, it would crank perfectly, and it would sound like it very briefly started, and I would let off the ignition since it seemed like it had started or just barely on the verge of starting, but then would die immediately. I looked at the oil pressure gauge (which is a gauge on my dodge, not a light) and the gauge did not raise when trying to start, so I assumed it must be the oil pressure sending unit, though I don't know if the gauge is actually supposed to raise when turning the key to the "on" position or when actually turning the engine over. But I did go ahead and replaced it.

After replacing the oil pressure sending unit, the truck still cranks very well, but it never even attempts to start, which is a little different than what it was doing before, since before it was cranking and nearly starting but immediately shutting off.

I should note that I also noticed the lower ring of the battery connector terminal (to the negative side of the battery) was corroded and part of it had snapped off, which made it impossible to fully tighten it to the terminal. I thought maybe this could be related and maybe it was causing an electrical issue of some kind, and I replaced the connector, but that did not change the issue in any way. And even when the connector was not able to fully tighten, it never affected the truck's ability to turn over like normal.

I also noticed the last time I tried to start it that the RPM gauge is not rising. It is just barely moving, almost imperceivable, and the needle is definitely not rising up past the "0" mark on the gauge and basically not moving at all, so not sure if this could be indicating something.

So, at this point it is cranking healthy, but no start.
Not sure if I just need to start from scratch on the "crank no start" diagnosis, but any direction you can point me in would be greatly appreciated.

I forgot to mention that the "check gauges" light only came on when the truck initially stalled, but it has not come back on at all since the first time. Also, no pending or stored trouble codes. I am just using a cheap $40.00 scanner, so I'm not sure how well it does with pending codes as opposed to stored codes.