You can use the logic function I shared to show the HTML widget if the cookie choice hasn't been made. However, since the choice is made within an HTML widget (I assume) then this is a bit more complicated and you would need to use cross frame communication. This tool by @MaxZieb makes it more simple to integrate: Hype Global Behavior (Custom Behavior Extension)
From a high level, here's how that works: Cross-Domain IFrame Communication using HTML5 | by saurabh bhatia | Medium