It is available in 4K UHD on Amazon Prime Video. Parents guide - The Immaculate Room (2022) - IMDb Content rating Rated R for some drug use and nudity.
Reviewers from Rotten Tomatoes describe it as a "decent enough watch" for those interested in low-stakes human isolation studies, though some found the pacing slow. The Immaculate RoomHD
Available on Hulu, Tubi, and Netflix (region dependent). It is available in 4K UHD on Amazon Prime Video