Dutch brand NLXL. http://usa.nlxl.com/collections/archives-wallpaper-by-studio-job  $300 per roll! I think it's Alt Deutsch

@palimpsest I agree, but the openings on either side of the fireplace lead through to the dining room on the other side. The side that is being blocked by the Christmas tree in the first photo has a built in cabinet with counter and book case that separates two rooms, but the right side if the fireplace can be passed through (although just the dogs do, we dont walk through it). There is a bedroom upstairs on the other side of the fireplace wall. I’ve seen a house on my street where they closed off the rooms completely from each other, but I don’t think that’s something I want to do here. Here is the reverse side of the fireplace wall (seen from our living room) - it is usually the dining room, but it is currently filled with stuff bc of the kitchen and floor work going on. There is a central courtyard that the dining room opens up onto, so I like the light that it lets through.. the room I’m putting the panels in faces north and the roof extends over the front patio area, so it’s quite dark. Especially since we haven’t added lights yet in there!

https://casoca.com.br/revestimentos/revestimentos-de-parede/tecidos-para-parede/tecidos-para-parede-natureza.html

I haven’t seen it in wallpaper form, just fabric (discontinued): https://www.kovifabrics.com/search/product-detail/6485 This similar one came up in wallpaper, but it’s peel and stick: https://www.decoratorsbest.com/products/waverly-wailea-coast-peel-stick-black-green-wallpaper?gclid=Cj0KCQjwj_ajBhCqARIsAA37s0y51_xHQWdr6j4YlCLD9lDanJltEvl0MZ6pr132YF3Bx_81RZFZQQEaAu5YEALw_wcB I hope someone else can find the one you’re looking for, good luck! ETA: If you’re interested in the Waverly paper, lots of sites sell it, even Big A: