How to add data to page history (Angular 7)?

Question

Angular

Good afternoon, I organize buttons back forward on pages (pushstate popstate events). It seems to have done, I also did the scrolling to return to the previous scroll position. What about pagination? Let's say I have a "MORE" button and let's say I clicked 5 pages, i.e. when going to the next example and returning to the previous one, where the 5th page is, I need to keep some kind of key ... I would like to keep it not in the url, but let's say in the history for scrolling, how to do this, do not tell me?
https://dv.iod.media/tag/showbreez