WCS 1.1.1 returns no coverages on ESRI WCS endpoint

[rsignell-usgs]

The USACE has a lidar database available via ESRI WCS that I'm trying to access. I can access via WCS version 1.0.0, list contents, and do getCoverage requests on identifiers listed in the contents, but with version 1.1.1 (also supported by the ESRI WCS server) there are no layers listed in the contents:

from owslib.wcs import WebCoverageService
endpoint='https://usace-ags.esriemcs.com/arcgis/services/JALBTCX/JALBTCX_Products_1mGrid/ImageServer/WCSServer?request=GetCapabilities&service=WCS'
wcs = WebCoverageService(endpoint,version='1.1.1',timeout=60)
len(wcs.contents)

returns

0

[cefect]

Having the same issue in Canada

url='https://datacube.services.geo.ca/ows/elevation'

But this server doesn't seem to support any other WCS versions :(