Something is up with the Astral Chain IP, but PlatinumGames can't say.
Astral Chain was one of the sleeper hits from 2019. It’s a great game full of weird moments, but that’s exactly what you might expect from its director Takahisa Taura who previously designed and worked on
Nier: Automata. Apparently despite what you may have read or seen before,
Astral Chain is now exclusively a Nintendo IP.
Astral Chain has been a Switch exclusive ever since it came out, but, as reported by VGC, PlatinumGames expressed interest in porting it over to other consoles. It seems like that will be highly unlikely now that Platinum no longer owns the property.