@cdallum Ok, wasn’t sure if you did, or didn’t, lose that Dashboard component. I have done what you want by creating virtual devices for reporting temperature in all my rooms because I have other physical devices that can also report temps. In the image below, the temperature device is virtual and getting the temp from the motion sensor:
Instead of putting the virtual temp device in each room, I could create a separate Room called Home Temperatures and putting all the virtual device in there for a nice and fast view across the house.