What Happened
I heard that the XR Content repo is now publicly available. Per plans I tried to remove my local copy of that content to verify that customers will be able to download it from within the Editor.
I read the docs (https://github.cds.internal.unity3d.com/unity/arfoundation/pull/363/files) and did the steps below, but the sim envs do not become available in the AR Env Overlay, and I get the Console error below.

How to See the Bug
Clean your package cache.
Pull AR Foundation 5.0.0-pre.10 (0a49b4f).
Delete com.unity.xr-content.xr-sim-environments from your local repo, and remove it from the Samples project package manifest.
In Project settings, enable XR Simulation provider.
Window > XR > AR Foundation > AR Environment.
AR Environment > Import Sample Environments.
AR Environment > Refresh environment list.
Only DefaultSimulationEnvironment is available in the AR Simulation Overlay, and Console has the error below.

Console Error
Can't install content from package com.unity.xr-content.xr-sim-environments - no sample available.
UnityEditor.EditorApplication:Internal_CallDelayFunctions () (at /Users/bokken/buildslave/unity/build/Editor/Mono/EditorApplication.cs:371)

Configuration
2021.3..2f1 (2021.3/staging d6360bedb9a0)
MacOS 12.0.1, MacBook Pro (15-inch, 2019), 2.4 GHz 8-Core Intel Core i9
AR Foundation 5.0.0-pre.10 (0a49b4f)