I have a 2024 2500 Laramie, and I’ve found the gauge widget to sometimes work, and sometimes not. Restrarting the radio seems to work for a bit, but after a bit, some will not function.
One thing I noticed recently is that there are more than one style of gauges, and one style seems to work a lot better than the other.
The gauge widget you can add to one of the home pages looks a lot like the gauges in the towing dashboard. This is under Vehicle —> Dashboards. On my truck, I also have Off-road Dashboards. There is an Accessory gauges screen here as well. This screen doesn’t have the trailer brake controller gauge, but it does have the rest of them. So far, this screen appears to be working 100% of the time, while the towing dashboard or gauge widget is a bit more unpredictable.