I have a mobile friendly site, and I added a completely new page recently, and I noticed that it ranks higher on the desktop search than on the mobile search, and it also does not have the tag "Mobile friendly" despite it passing the "mobile friendly" test on google.
Other results for the search query have that tag, which is why I believe its ranking lower in the mobile search
So I am guessing that new pages do not start out with the "mobile friendly" tag but rather have it added later? is that a correct observation? how long would it take for the tag to be added?
I will keep watching that page in the mobile search results and will update here if the tag gets added