List of permissions that can not be blocked in the Google Admin Console under Device management> Chrome> User Settings.
Co:Writer Extension:
management
tabs
activeTabs
tts
ttsEngine
notifications
unlimitedStorage
webNavigation
contextMenus
webRequest
webRequestBlocking
webNavigation
Co:Writer app:
tts
storage
unlimitedStorage
contextMenus
audioCapture
videoCapture
identity
app.window.fullscreen.overrideEsc
Snap and Read Extension:
management
tabs
activeTab
tts
ttsEngine
notifications
unlimitedStorage
webNavigation
contextMenus
management
webRequest
webRequestBlocking
storage
Word Bank:
Management
tabs
activeTab
tts
ttsEngine
notifications
storage
unlimitedStorage
webNavigation
contextMenus
webRequest
webRequestBlocking
notifications
Quizbot:
activeTab
tabs
management
tts
ttsEngine
notifications
unlimitedStorage
webNavigation
contextMenus
management
webRequest
webRequestBlocking
storage