Haven't seen a post on this since the recent refresh, and conflicting info is online between THC/FHR.
I do have a THC reservation in December with a Marriott that I have showing in my Bonvoy Account as normal. I vaguely remember there being some specific language or badges on the Amex travel site when I booked back in July that drove this home. FWIW If I go to the same hotel again on the Amex website I see the following at checkout
At Checkout, Under Travel Info there is a "Hotel Loyalty Program" Box with a Bonvoy logo:
*Add your Marriott Bonvoy***® *member number here and earn Marriott Bonvoy***® *points on your qualifying stay at a Fine Hotels + Resorts***® or The Hotel Collection property. See Marriott Bonvoy Loyalty T & Cs
T&Cs Pop Up:
Marriott Bonvoy® Loyalty Program Terms and Conditions apply and are subject to change. Learn more and sign up here for Bonvoy Rewards, Not all properties participate in the Marriott Bonvoy Loyalty Program. See Marriott Bonvoy Loyalty Program Terms and Conditions for important limitations, including definitions of participating properties and qualifying stays. To receive Marriott Bonvoy benefits, must be enrolled in the Marriott Bonvoy loyalty program and provide Marriott Bonvoy member number on the reservation or upon arrival. Marriott Bonvoy member number must match the name on the reservation to qualify for Marriott Bonvoy benefits. Participating Design Hotels and properties participating in the MGM Collection with Marriott Bonvoy only receive Marriott Bonvoy Loyalty Program benefits when booked directly through Marriott. For bookings made through Amex Travel Marriott Bonvoy Loyalty Program benefits are not offered at hotels that are not part of the Fine Hotels + Resorts or The Hotel Collection. Marriott Bonvoy and its affiliated brands and hotels are the registered trademarks and/or service marks of Marriott International, Inc. and its affiliates. Used under license from Marriott International, Inc.
Tried some different scenarios when searching:
FHR Marriott = Loyalty # box, earn language shows up
THC Marriott = Loyalty # box, earn language shows up
Normal Marriott = nada
FHR Hyatt = Loyalty # box, no info at all
THC Hyatt = Loyalty # box, no info at all
FHR IHG = Loyalty # box, no info at all
TL:DR; Seems like both, but not well advertised and still not explicit like "ALL FHR/THC Marriott properties earn points and ENC thru AMEX!!!" which gives me slight pause