If it managed to still get the point across, then it still got the point across. I do think the key in translating The Backrooms lies in that you can't treat it like a straight-forward adaptation (and if it's treated more as an Original-IP along the lines of Jason Universe, Chucky: UKC, or even The Weeknd: Nightmare Trilogy).
You will need someone who is part of the sect to be able to help get the creatives onboard on how to translate. If it's an adaptation of Kane Pixel's indie series of Enter The Backrooms combined with the film, assuming if Murdy, Aiello, and Kane are working together; I could see a case/point made if they try to cherry pick.
Also helps that Murdy doesn't seem to be ruling out indie animation for HHN in consideration. Perhaps I'm off base.
But… again… liminal spaces (the whole basic premise of The Backrooms) is premised entirely on isolation. That requires being alone (or a part of a very small group. It also (commonly) involves vastness or distance in a physical space and silence to emphasize the isolation and loneliness.
The ability to imitate the physical space is possible (with mirrors), though those effects require either extra space backstage (which is why Universal doesn’t use them all the time) or screens or dioramas (which always comes across as pretty flat). The silence is much harder at scale. You can’t do a whisper hallway for the entire house. The isolation is legitimately impossible in a HHN house.
Now, I haven’t seen the movie yet. Assuming the film doesn’t devolve into a purge-like monster-fest, it’s not really comparable to A Quiet Place. The primary fear-driver in AQP isn’t the silence itself, it’s the Death Angels. The silence and ASL is a way to AVOID a very physical, violent creature that can be anywhere. The Death Angels are an ever present danger (that’s why we see the kill in the opening, to establish they can be on you in an instant).
The Backrooms (from what I gather), don’t have that sort of ever-present danger except the rooms themselves (and the idea of what could be there, not exactly what is). And those are scary because they’re liminal spaces. That is THE primary driver of the fear (which I mentioned, cannot truly be replicated at HHN); the idea of what can exist in the emptiness. That means that any attempt at a Backrooms house is going to immediately have to work around the thing that makes The Backrooms works. If there are no visible (or extremely few) antagonistic creatures, the actual scares would be… victims looking around lost?
I liken it to Grave of Flesh. Grave of Flesh actually did a good job of confusing you, making you feel lost, and replacing the sense of isolation with a constant “what is happening,” mindset that kinda sorta parallels liminal spaces. And those exact, liminal-type sensations were what people hated about the house.