I use it like yogurt -- usually I chop fruit and and nuts on it, or I thicken my breakfast oatmeal with it. I don't sweeten it beyond fruit, though you could. You might also check YouTube. Actually I just did and it returns a lot of ideas: https://www.youtube.com/results?search_query=okara&oq=&gs_l=

Speaking of yogurt, I plan to start making soy yogurt too.

There is a fast food chain in Singapore which used the left over fibres in granola bars. At least that's what they said in a documercial: https://www.mrbean.com.sg/product-category/granola

The best use I found for it was making a kind of granola. I can't remember the exact recipie I used but a bunch come up when searching.