Does Apple support software TotalAV for protection?

No, you have no need for AV software, because the iPhone does not get viruses. You only need to use common sense about what you download to avoid malware, spam etc..

Check this link...

Effective defenses against malware and ot… - Apple Community

edwardfromlenoir city wrote:

Does Apple support software TotalAV for protection?

No, that is a third party product which I do not recommend for any Apple device. Disclaimer: I don't work for Apple.

You are welcome. As a senior myself, I'm glad I could help.