EDITION hotels, at least the one at Reykjavik, Dubai, and London use Le Labo.
The bottle on those hotels claim its EDITION exclusive but the smell was very close to Le Labo The Noir.

Luxury Collection Grosvenor house in Dubai use Luxury Collection exclusive by Byredo (Mojave Ghost)

Maxwell Reserve and Duxton Reserve Singapore both use Dyptique Phylosikos
I wouldn't be surprised if The Vagabond Club and Serangoon House (Singapore) use the same brand as they all under 1 owner.

The Hermitage Jakarta use local brand called Martha Tilaar

Marriott Tangs Plaza Singapore, use Marriott generic brand. Their shampoo have citrusy smells like W Hotels Bliss Brand, however their shower gel smells like those eucalyptus medicated oil.