You can use ACF to create the image field for each post category term.
Make sure Yoast SEO's featured image is replaced, but best to find a filter hook closest to the source function of how the featured image is retrieved for a post in the first place.
This is immediately useful for Completionist posts. Also, the post's primary category is the one that should determine the featured image. I believe we're already fetching the post's primary category in the posts archive loop.
You can use ACF to create the image field for each post category term.
Make sure Yoast SEO's featured image is replaced, but best to find a filter hook closest to the source function of how the featured image is retrieved for a post in the first place.
This is immediately useful for Completionist posts. Also, the post's primary category is the one that should determine the featured image. I believe we're already fetching the post's primary category in the posts archive loop.