How can I filter posts by data in a related post type’s ACF field?

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At the moment, I’ve got my data organized into two custom post types that I created with ACF called `objectives` and `routes`. I’d like to add a filter on my `objectives` archives page so that the user can filter out objectives based on a field within `routes` called `distance`. Basically something like “of all these objectives, show me those that are under 5 miles in distance (e.g.).”

I’m looking for suggestions for plugins, code snippets, examples, etc., that I could use to achieve this.

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