Where was Tholvi F.C. filmed?
2023 Malayalam film
Tholvi F.C. (2023) was filmed in Kakkanad, Thrikkakkara and Bharata Mata College, 3 places named in its Wikipedia article, in India. Wikidata records no filming location for it at all, so the article is the only recorded source. Each place says where its claim comes from.
Places per Wikipedia's article
The Wikipedia article names 3 places. Each links to the sentence that says so.

