Where was Guardians of the Formula filmed?
2023 Serbian film
Guardians of the Formula (2023) was filmed in Brinje and Jožef Stefan Institute, 2 places named in its Wikipedia article's Production section, in Slovenia. 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 Production section
Wikipedia’s Production section names 2 places. Each links to the sentence that says so.

