Sorry for re-posting, I just created an account.
When I go to Settings > Apps & notifications > see all (X) apps > (hamburger menu) Show system > Android System > App notifications > under the "Display over other apps" section, there are a bunch of apps showing up which I don't have installed anymore. The only solution besides resetting my phone (yes I am a bit OCD, so I might) that I came up with is to reset the "Settings Storage" apps.
Here are the screenshots as I am not sure if this text box allows pictures.
http://prnt.sc/thtnba and
https://prnt.sc/thtp4j
and this is what happens when I click on one of the uninstalled apps:
https://prnt.sc/thtr15
Phone - Moto G4 Plus running android 8.1.0
Thank you!