I am pretty sure it is Thibaut. If right click the photo and do a google image search you should find it. Found it ! Thibaut Regina

Phillip Jeffries is to the trade. Find a retailer who carries it, or an interior designer. You can not purchase online. You need to show it via the WEBSITE to a very EXPERT paper hanger, who will advise you of needed quantiyy based on its repeats, width etc. and an on site visit to your room. Expect KACHING!!! on the paper and the EXPERT installer.

“The post does have a website attached to it, but they do not reference anything about the wallpaper 😕; it’s just a picture they posted... I also emailed, but no response.” It sounds like you didn’t contact the designer (I couldn’t tell from what you’ve written whether it was “Design Chic” that you contacted). The designer they say is Jenkins Interiors. That pic is on the Jenkins Interiors website under their bathrooms pics. Here is another pic from their website using that wallpaper. You can contact the designer using their website’s Contact Us page—unless that is what you already did: https://jenkinsinteriors.com/contact

It's Queen Anne (Taupe) by Rifle Paper Co. from Hygge and West that's been discontinued. https://www.instagram.com/p/B1MWFr_l5uW/ Benninger 33' x 20.5" Botanical Wallpaper in taupe by Gracie Oaks is a very close match. So is A Street Prints 271623867 Gossamer Grey Botanical Wallpaper.