Mine shows as Kings Cross Station! It depends on what zoom setting one is using I think.
Zoom makes no difference on my phone. On high magnification a separate photo pin labelled King's Cross appears but no change to the label against the double arrow icon.
Indeed, this is another problem with Google Maps where they don't cull/merge duplicate listings. In fact there are currently triplicate entries (see attached screenshot collage): London terminal (a "train station"), Kings Cross Station (a "train depot"), and London King's Cross (a "tourist attraction").
"London terminal" is the listing that's interlinked with the train running data (and comes with the double-arrow logo and the train station symbol). In particular, this means that when looking up calling points for a train the station is shown as "London terminal" (although the train destination field is still "London Kings Cross"), and if you make a public transport journey search you get instructions like "walk to London terminal").
I've found that when typing "King's" into the search bar, a suggestion of "King's Cross Station, Euston Road, London" with the train station symbol comes up, and if I click it I get the "London terminal" entry, so it seems that Google Maps knows that "King's Cross Station" is an alternative name for the entry, but it's decided that "London terminal" is the main name to be displayed everywhere. I recall there used to be a way of inspecting and editing the alternative names (maybe back in the Google Map Maker days?), but I can't seem to find it anymore.
Next door, we have "St Pancras International" (a "train station" with live train data), "St Pancras International" (without any type declaration) and "Saint Pancras Station" (a "building"). Interestingly, in between there's a "King's Cross St. Pancras Underground Station" (an "underground station") with live tube data, and a "King's Cross St Pancras tube station" (a "public transport station") with the same live tube data, plus live bus data and live train data for departures from St Pancras, which would indicate that some manual effort has been put in to combine various automated data sources, but not in a consistent way.