Highlighting text in Safari on iPad

I am developing an application that allows user to highlight text in a web app. With iOS on iPad many users would like to use their Apple Pencil to highlight text. While it is of course possible to highlight text by double tapping or holding the pencil down, I would like to enable users to activate a mode in which they can just brush over the text to highlight it.

Is there an API in Safari for iOS that enables such behaviour?