I have had both. Some that pop up with a history and some that pop up without. I did have a new Floor Heater device pop up today that came with a half day history. I’m pretty sure it’s the floor heater in the bathroom.
That’s pretty normal. It seems to take days (sometimes longer) for the data to catch up with the events. There is data there, but as Sense keeps saying, “patience”. Eventually most announcements do get data….but I’ve also seen some that never did.
I have had six devices add in the past week, including 5 overnight yesterday. Only one doesn’t have historic data, and the ones that do go back to at least February.