Is NSUbiquitousKeyValueStore E2E Encrypted with Advanced Data Protection?

I haven't been able to find a definitive answer to this online. Is NSUbiquitousKeyValueStore end-to-end encrypted with Advanced Data Protection turned on? It’s not specifically called out here https://support.apple.com/en-us/102651.

Is NSUbiquitousKeyValueStore E2E Encrypted with Advanced Data Protection?
 
 
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