Justin Briggs has been in this Google test bucket where he is seeing Google mobile search results with very few organic results, mostly two organic listings, sometimes up to five but never more. In addition, there is no "next page" button, it just says "see more results" which would dynamically load more results.
Here are some of his screen shots of this:
Getting a mobile SERP test that’s limiting results to 2-5 results, for all queries. Chrome on iOS. pic.twitter.com/zm0WMw3Nv5
— Justin Briggs (@justinrbriggs) December 5, 2017
Here is a more full size screen shot:
This is not surprising because (a) Google is always testing things and (b) I doubt most people scroll past the first few results anyway on mobile.
Forum discussion at Twitter.