Thanks to confirmation from developer ONE-O-ONE GAMES.
https://linuxgameconsortium.com/the-suicide-of-rachel-foster-support-way/

https://www.gamingonlinux.com/articles/looks-like-the-narrative-thriller-the-suicide-of-rachel-foster-will-come-to-linux.15985

That's very nice to see.

I successfully ran the game in Linux using a "generic" install via Lutris, which is outlined here:

https://forums.lutris.net/t/very-brief-tutorial-on-manually-installing-a-game-in-lutris/2028

"Ultra" graphics were very choppy on a GTX-1070Ti (!?). Dialing it back one stop was perfectly smooth.