John Doyle of the Globe and Mail wrote that the show "stays away from the pseudo-seriousness that could easily plague a comedy about immigrants and family dynamics. There is little obviousness and mugging, and moral lessons are few in the breezy speed of it. What’s it all about? Good jokes, mainly. Heartily recommended, Kim’s Convenience is a clever, generally engaging screwball comedy with an eye on entertainment."
The Toronto Star's Tony Wong writes: "The show is good. Possibly even great. The dialogue is sharp, on point and borderline subversive. It has bite...It’s funny and true, but
not a reality we typically see reflected on television."
[Reception in Kim's Convenience (TV series) from WikiPedia
https://en.wikipedia.org/wiki/Kim%27s Convenience(TV_series)]
"Not a reality" isn't a subject.
So I wondering how "not" qualifies "a reality," because I have known we can use the structure "not a noun" only when "not a noun" is a subject.
Please let me know the structure.
Thank you in advance for your help.