[2022] Why is there no Simplified Chinese in the settings options?

Hello @hlyc thank you for getting in touch with us and welcome to the forums.

Simplified Chinese is available for the games menu interface and subtitles, but there is no Chinese audio available.

You should be able to select a Simplified Chinese interface and subtitles by changing the top left option in the first screenshot you uploaded, via the 'Text Language' option. The language options available will also depend on the regional version of the game you have purchased and from which Store, as there are different regional versions of the game, with different language options available to each player.