how to remove the virus from the iphone 8
How can I remove viruses from iPhone 8
Unless you did something to jail break the phone, the chances you actually have a virus or very, very low. What makes you think the phone is infected with a virus? Adware/malware? More information would help.
You can try the below to see if it helps.
https://apps.apple.com/app/apple-store/id1327105431