The country property seems to be set from the region parameter of the {{#coordinates}} parserfunction [1]. When the coordinate comes from Wikibase (as is the case with that category page), it seems like it is never set [2]. I did not check the other properties but presumably the same situation.
[1] https://gerrit.wikimedia.org/g/mediawiki/extensions/GeoData/+/f2fc19967630d0... [2] https://gerrit.wikimedia.org/g/mediawiki/extensions/Wikibase/+/c962837948cd6...