How do I remove viruses from my iPhone 13 Pro Max?

You keep getting scam/phishing messages, like we ALL do. You don't have any viruses on your iPhone because there are no known viruses for iPhone in the first place. Ignore the messages. Don't interact with them. Block them. Delete them. Go on with your day.

Read this --> Recognize and avoid social engineering schemes including phishing messages, phony support calls, and other scams - Apple Support

Your phone does not have a virus.

The "notifications" are not from Apple. They are from scam artists who are trying to trick you into buying useless software that will fix a problem that your phone does not have.....or worse....trick you into providing personal information.

Ignore and delete any messages like this.