I've tried to find some official info on this in the official Kentico 13 (.Net Core) Documentation without success.
I am wondering if there is a way to restrict the use of page builder widgets by user role (either allow or deny widget usage for the role).
I would recommend checking out DevTrev's Widget Filter nuget package, you should be able to limit widgets based on user roles:
https://github.com/KenticoDevTrev/XperienceCommunity.WidgetFilter
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