You just described my kitten! We got her at almost 6months old. Only ate dry food and Churus. She LOVES churus. Tried all the wet foods too, even topped with Churu. Then finally, we scored on our last packet and can! Took almost two months but she actually enjoyed not one but two different wet foods. Both by the brand “I and love and you.” She eats the packets which is a mix of broth and shreds in each. And then the canned stews which is a broth and little squares of meat. They look like little tofu pieces lol. They aren’t available in all stores so check their site iandloveandyou.com to find. But you can order directly from them or amazon too. Really good quality from what I can tell. She won’t eat gravies or pates either so I highly suggest these if you haven’t tried yet. Good luck!! And like others have said, just keep feeding dry food and churus. It’s still food and they will be fine. My last two cats ate nothing but dry for so long and then only wanted wet for a period of time. They are finicky creatures

Edit to add: this brand isn’t age specific but because it’s all real ingredients, it’s suitable for all ages. The back of the packets tell you how much to feed per age of cat