Add the ability to override layer visibility in Portfolio

[HaileyWright1]

Please add the ability to override layer visibility in Portfolio so that different layers from the same web map can be showcased in various tabs. I am looking into migrating a deprecated classic map series app over to Instant Apps - Portfolio, but the workflow includes creating several redundant maps since duplicate maps are not permitted by Portfolio.  In my classic map series app, I embedded the same map in several tabs, but each with different visible layers defined. This capability in Portfolio would simplify the workflow and eliminate the need to publish several redundant maps that have no value outside the application.