I won’t answer for him but I’ll answer for me because I use the same widget on mine. That widget also shows other items’ level of battery charge when those other items are in use. For example, mine most often shows my AirPods’ (including their case’s) battery charge level.
I recently upgrade to an iPhone16 and bought an Apple silicone case, it's easy to handle but I miss the leather case that I had for my iphone14. I picked up an Otterbox Cactus leather case but it's rough and I don't see it having a nice patina with age.