I hadn’t realized that before but I was wondering beside Page that have “Publishing > Schedule…” but what about shared assets? There is no option for that. I think this will be very nice to have it.
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As you are aware, currently that is not a feature for assets. You can link the asset to a page and schedule the page as a work around, as long as the asset is approved it will be published when the scheduled page is published.
I will be creating a Feature request for this enhancement and including your comments in the request. We appreciate your feedback Aaron to help us improve our products! It is very valuable to us.