I'm actually thinking of buying the Jouyoung Soymilk Maker to use in Sweden and I've been watching review videos on Youtube.
There isn't a puree function per se but the soymilk maker has several cooking modes that you try: soymilk, soup, rice paste, juice etc. I think you can use the rice paste function to get the closest consistency to a puree. Just ensure that the pure is smooth enough with no large chunks before feeding to baby. I found a video that claims to use the Jouyoung to make a puree but it looks more like a soup to me, maybe you can get some inspiration from it:
https://www.youtube.com/watch?v=Lxu8xgChPoE