How can I find weather my iphone has been hacked

It, and all such messages, are scams presented by criminals. Close the offending page and avoid sites that are involved in such bogus advertising tactics.

Phony "tech support" / "ransomware" popup… - Apple Community

yes, I can see your screenshot. I'll refer you to stedman1's post, just above your last post.

As he says, it's a scam.

Your iPhone is not hacked, they are trying to prey on people's fears and get you to click on something.

That is a scam message that is designed to create fear and panic hoping you’ll click the link. Your phone cannot be hacked directly so criminals try to get you to do something that could cause problems on your phone, like clicking their link. This is typical fear mongering to get you to do something that you wouldn’t otherwise do. As others have stated, close the page and ignore it.. it’s fake.

menuli wrote:

i got 2 messages saying that my browsing history and frontal camera photos are been transferred by a hacker

Still a scam. Unfortunately, there are hundreds of thousands of such scam messages presented on the Internet everyday. The only reason the criminals continue such scams is because they find a victim everyday. Don’t be that victim.

Hello ~ Take a look here:

Recognize and avoid phishing messages, phony support calls

~Katana-San~

If you have not jailbroken your iPhone, then it's not hacked.

What are you seeing that makes you think it might be?

As 2 replies have told you at this point.. it's a scam. They are trying to scare you.