Android Icon is not showing up.

Hi people, first time posting so tell me if i'm doing something wrong

So I have a sprite in the default icon and the legacy icons. However, when I build my project to android it just has the default unity logo as if I didn't have a custom app icon. I don't have any plugins I manually downloaded.

Any help or ideas are appreciated!

Things I've checked:
-My phone is a galaxy S8 and has the rounded edges app icon, not a circle.

-The apk files and the Icons are all there in the res folder in the final apk. They all begin with "mipmap-" and followed by the correct resolution. and inside the png files are named app_icon.

-The manifest file also contain "android:icon="@Mipmap/app_icon" in the application tag.(The M is lowercase in mipmap, this forum just made it uppercase because of the @ symbol in front)

-My last app that I made in Unity 2017 had the same thing and still worked.