IME it is driven not as much by chain policies but state/county guidance and hotel management enforcement - i've stayed in at least half dozen different Hyatt Places and prob 6-8 other similar type of properties from other chains over the last 4 months ... for example CO properties had much stronger enforcement of various measures relative to UT or NV but even within the same state HP Moab was very careful and proactive while HP St George didnt bother to do much..
Same applies to restaurants and stores - an older lady running a market and coffee shop in Escalante never wore a mask or required others while a younger couple taking care of another coffee/breakfast joint 50 mi away was very strict with precautions.
Just play it safe and wear your own KN95 or N95 in public - dont rely on how others manage things.