This is quite related to https://kagifeedback.org/d/129-add-button-for-more-results-of-specific-domain .
My suggestion is to actually make the button for showing more results inline.
When searching for some more niche topics, often a lot of the results are concentrated on one or a few domains. While the current "⋮" -> "more results from this site" works, it's cumbersome (the "⋮" button is small, and then you still need to click another item in the menu.
Honestly, this feels like one of those things Google actually does right, where you get a "more results" link when there are many results from a domain, but it could also be done a bit differently:
In this mockup, there's a "more" button that would expand the section by loading in more results rather than redirecting to a page with just the results from this page. This would allow for quickly checking another couple of results from the page, as well as being an indicator showing that there are more results available.
