Virus detection software for iPhone after bank account hack

Your bank account was compromised. This has nothing to do with a "virus".

The first virus on an iPhone has yet to ever be detected in the real world.

Don't waste your money to try to fix something that does not exist.

There are no viruses in the wild for iPhone. It’s not recommended to install any antivirus software. The use of antivirus software and VPN are known issues for banking and financial apps and secure websites. M

It sounds like the bank is using recommendations for Android phones to iPhone users.

A non-jailbroken phone cannot be hacked, get a virus, or malware. You are fine.