Not a dev but I seriously doubt that these (mostly) aesthetic features will ever be included. Especially the notification border lights. GOS is a "security first" endeavour and as such, it's safe to assume that these type of additions are not priorities.
Meanwhile, Samsung are a company who bloat their phones more and more with each model release, it seems. Apps such as Meta/Facebook and Mobile Sevices Manager are uninstallable. The latter of these has the sole purpose of...wait for it.....automatically installing more apps in the background.
I only mention this because I think there might be some irony somwhere here. Samsung do have some nice features, though. I love the Clipboard Edge Panel and I also low-key like the aforementioned animated, color Edge Panel Alerts "light show". But don't tell anyone...just make sure to look at me when my phone rings and I Tik-Tok dance to my One Direction ringtone.
;)
edit/add: Just to be clear, I'm just kidding with the snarky 1D comment at the end there. And between my kids and I, we have multiple Samsungs, ourselves.