They could release embeddings for their categories, they claim to have over 150K categories so that would help understand what is "close" to the categories you

They could release embeddings for their categories, they claim to have over 150K categories so that would help understand what is "close" to the categories you like. To proper interpretate why some recommendations got in your feed you will need access to your user embeddings so maybe they can do some sort of personal portal to explore those.