Why won't my S7 display incoming calls?

[AC Question]

Hello, I noticed that my phone is not displaying any incoming calls. The only time I know when someone called is 1. when they leave me a voicemail 2. I have the phone in my hand and notice a phone symbol flashing on the notification bar. I checked my call settings and can't find anything related to 'call notification pop-ups' which some other guides have told me to look for. Any other suggestions? Thanks!