Antivirus

Apple don't recommend any.

When you get a chance, please read these articles.

Keep Mac safe

https://support.apple.com/guide/mac-help/set-up-your-mac-to-be-secure-flvlt003/mac

Protect your data and your Mac

https://support.apple.com/guide/mac-help/protect-your-data-and-your-mac-mchl8ec502d0/

Security. Built right in.

https://www.apple.com/macos/security/

Protect your Mac from malware

https://support.apple.com/guide/mac-help/protect-your-mac-from-malware-mh40596/10.15/mac/10.15

Use iCloud Keychain to keep information safe on Mac

https://support.apple.com/guide/mac-help/icloud-keychain-information-safe-mac-mh43699/mac

What is malware

https://support.apple.com/guide/mac-help/what-is-malware-on-mac-mh27449/11.0/mac/11.0

Apple can’t check app for malicious software

https://support.apple.com/guide/mac-help/apple-cant-check-app-for-malicious-software-mchleab3a043/mac

Guard your privacy on Mac

https://support.apple.com/guide/mac-help/guard-your-privacy-mh35847/mac

Hi,

I think you don't need to install antivirus utilities since antivirus utilities come with macOS.

Some people say it's not good enough, though.