rivian key fob

When I select the key tab and look at my key FOB there is a very, very small yellow box next to the FOB in the list of keys. It looks like it is a battery gauge of capacity or power level, am I correct? Or, what does the small icon represent? The little box looks either 3/4 full or 3/4 empty...

Hi found a key fob yesterday Kits/Point Grey. Please contact me if it's yours!