I don’t have this app and it pops up in my screen time

ok So I saw that someone else was having the same problems and had no answers to it so I now need some help. For the past few days now my phone has had a app that I have never downloaded that I’ve never touched never used my family members don’t use it or never touched it and yet it pops up in my screen time it makes it so aggravating because I only have two hours of screen time for games and that app uses 30 minutes of my game screen time that app is named myMail:e-mail client box app if anybody knows what to do please tell me or do I have to get like some sort of antivirus because I’m starting to think this is a Trojan horse