It is very dependent on how your page is structured. What elements are bigger and smaller, what are the colors, is the footer distinct enough from the rest of the page?
You can look into this research, it gives pretty good insight on how users scan the pages: Scanning Patterns on the Web Are Optimized for the Current Task
There's also this pretty cool UX law called "Serial position effect" that states
Users have a propensity to best remember the first and last items in a series.
On the phones we have limited screen estate, so it's entirely plausible that while scrolling on a smaller screen the last item of the screen is percieved as the last item in the series. Like, on larger screen they see your footer as a series, but on the phone - the entire screen.
I've also noticed, that people are sometimes scrolling to the end of the screen just in case to see what else is there, so they reach the end "just in case" and of course notice the last item more than the beginning of the footer region.
But it is really dependant on your page's structure, so there's a lot to consider.