Thanks manHey Kristova, I'm 100% stock rom. I can't root unfortunately. But I've found apps that could possibly make my S8 look unique in someway. I'm actually using an app called Floatify from the PlayStore. Pretty cool app has lots of neat features and different notification styles. That's why you see my notifs rounded like that, (iOS style). You can also reply to a text message right from the lockscreen if you wish. Try it.
Cheers bruh.