I really don't think the page scroll lock is the solution, it is for humans to 'read' the entire document, it is a frontend feature. Bots act I think one layer behind that, on an API, where page scroll lock will not work, at least I cannot figure out how that would work to be honest.

so much have been written about bots and how to prevent, or whatis possible or not. Search may give you the results your are looking for