Why is a default read concern of "majority" not possible to configure for a cluster in MongoDB Atlas?

If a read concern of “majority” can be specified for a transaction, I don’t understand why it cannot be specified as a cluster default.

The only valid options are “available” and “local”.

Thanks for your question. We are working to add the read concern “majority” option to the Atlas UI.

In the interim, please consider setting the read concern via the connection string: