Saisiyat (2516-xsy) = Severely Endangered (100 percent certain, based on the evidence available) (The Saisiyat are very much involved in language preservation. But there is a "language" gap between people over 80 (they have their own intonation, grammar etc.) and those under 80.)
Glottolog
[xsy] at ISO 639-3
[xsy] at OLAC
[xsy] at IMTVault
Saisiyat at Endangered Languages Project
Saisiyat at Grambank
Wikipedia
Wikidata