Update!
I just noticed that the cluster update appears on the projects activity feed. But when I navigate to the Atlas → Browse Collections → Select Collection → Indexes I don’t see the index there.
One more thing which I have noticed is the different operation types on the activity feed depending on how I create an index.
When I do it with MongoCli or API the project’s activity feed shows the Operation: createRollingIndex whereas when I create an index manually the feed shows Operation: createIndex