Reflections showing with red icon

Underlying data of the reflection is not going to change by definition. To save compute cycles, properties of Never Refresh, Never Expire are set to true.

I am observing red icon/flag next to all such reflections indicating these cannot be used. Is this expected behavior?

Can you hover over the red icon - it should include a message as to why its red. Note that if the schemas no longer match, the reflection will not be used.