Looking at all the features that older phones uses to have compared to newer ones, I never hear anyone talk about the removal of the notification LED. I personally really liked that feature, being able to see if I got an email, a text or missed a call without turning on my phone was awesome. My Samsung note 8 had this feature, but to my knowledge, newer phones (in the major companies anyway) have abandoned this feature. Did everyone else unanimously agree they don’t care for this feature?
My phone has a blinking white light. Pretty useless with the always-on display showing the notification icon, but it does work. I’m pretty sure the two phones I had before that had one as well, my Oneplus One had a customisable colour per app as well.
I think manufacturers could implement this by simply lighting a few pixels on the always-on display if they wanted to, but I guess there’s just not enough interest. Why brightly light a few LEDs when you can light an entire shape dimly? Add a basic clock too and you’ve got a modern AOD lock screen.