This is not a workaround…
Delboy gave you THE correct way to do it.
Facebook does not segment your result data based on Interests, you must do this yourself with by using separate Ad Sets. It’s the only way to optimize your targeting in the Facebook Ads platform.
In addition to it be the “proper” account structure method, it also allows you to have greater reach as FB tends to shut off all but one Interest group within your Ad Set, only you’ll never know which one they shut off, nor how the others are actually performing.
Each Interest Group will perform differently and you can adjust your budgets to favor those that perform better or switch to manual bidding to reach maximum bid performance optimization.
