For me it’s the notification light you used to find on older phones, was particularly good to know if your phone was charged without picking it up
The US was actually one of the first places the feature was removed, because (according to Samsung) there’s not really a need for it anymore since so many places adopted tap to pay so early. So we are actually just too far ahead in that regard for my taste lol. It’s also probably good to note that I haven’t seen this feature since the S20. (Also I definitely think Samsung exaggerated that and it was just cheaper to get rid of).
Still a very handy feature that I miss, there’s ALWAYS places you go that are still behind tech-wise XD