Where do I find clipboard on my iPhone 6s?

If you want to copy a hyperlink or text, please highlight it first and then click Copy and Paste in Note, Email, Pages etc.

In this case, the term copy to clipboard is used to indicate that what you want to copy (a hyperlink or text) is remembered by the iPhone's memory until you paste it somewhere.

See also this Apple article: Use Universal Clipboard to copy and paste between your Apple devices

Use Universal Clipboard to copy and paste between your Apple devices - Apple Support

A custom shortcut can be easily created to display the clipboard...

Screenshot of "Show my Clipboard" result:

Screenshot of "Show my Clipboard" custom shortcut in iOS 15:

You can also add that shortcut to the Home Screen:

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You can’t see the clipboard on any phone.