I do post shorts, and some of them have done pretty well. However, the number of views needed to make serious money with those is insane even compared to normal videos, and it's a completely different audience to the rest of the site. Additionally, given you can't add custom thumbnails for them and the way the algorithm works there is wildly inconsistent (seen some people get like, a hundred views from one short and a hundred thousand from the next one), it's a very risky game to put too much work into.
Have you ever thought about going full time on YouTube