There are several on Ravelry. Are you using the advanced search features on the left of the screen? I typed “hoodie” in to the search box and hit search. Then I narrowed it down to cardigan, child and free. If you want something else specific then you enter that. Your choices are already down to about 25. If you’re willing to pay a few bucks then you’ll get a lot more choices.
Glad you found them to be something you wanted to check out. I used the patterns, with modifications as I recall, for my grandkids. They are pleased with the results. Enjoy whatever pattern you decide to use. One of them was the first sweater I made, I only managed it because of all the help I got here.
Knitting sweaters for babies and children is great if you’ve never done sweaters before and want to take the plunge. They use so little yarn and don’t take much time. It gives you almost instant satisfaction. It’s good practice for making beautiful adult sweaters later on. The knitting and assembly techniques are identical.