I can’t clear history on my iPhone in safari or history what needs done to clear this please?

Hi there,

See this

1. Go to Settings > Safari.
2. Tap Clear History and Website Data.

Clearing your history, cookies, and browsing data from Safari won't change your AutoFill information.

When there's no history or website data to clear, the button to clear it turns gray. The button might also be gray if you have web content restrictions set up under Content & Privacy Restrictions in Screen Time.

To visit sites without leaving a history, turn Private Browsing on.

See this link for further reference

Clear the history, cache, and cookies from Safari on your iPhone, iPad, or iPod touch - Apple Support

Open the Settings app on your iPhone, scroll down and select Safari. Under Safari settings, choose "Advanced". Select the "Website Data" option. You will find all your Safari history here.

Tap on Edit and delete.