I guess this explains why Netflix will have different audio options for the same movie dependent on region.
You can get more tracks to appear if you change Netflix UI language in settings, as described here in 2015 by Netflix CPO: https://www.quora.com/Why-arent-all-subtitles-available-in-a...
This is also mentioned in various Netflix help pages, like here, which says 5-7 subtitle languages are shown by default, and you need to change UI language to see the rest: https://help.netflix.com/en/node/13245
You can get more tracks to appear if you change Netflix UI language in settings, as described here in 2015 by Netflix CPO: https://www.quora.com/Why-arent-all-subtitles-available-in-a...
This is also mentioned in various Netflix help pages, like here, which says 5-7 subtitle languages are shown by default, and you need to change UI language to see the rest: https://help.netflix.com/en/node/13245