Aniplex USA trailer; No release date
English dub: https://www.youtube.com/watch?v=L9MQLhV2u2E
shareImdb release info: UK 4 February 2021 (internet)
I would think pirates would have released that.
MovieChat Forums > Gekijôban Kimetsu no yaiba: Mugen Ressha hen (2021) Discussion > Aniplex USA trailer; No release date