Hello everyone! I'm struggling with one moment in my child's nutrition…

Hello everyone! I'm struggling with one moment in my child's nutrition: my son is categorically refusing to eat vegetables and fruits. The only thing he eats is bananas, and even then with some reluctance. In summer he could still bite on cucumbers from the garden or pick berries off the bush; now he turns away or throws them out of the table ( He used to love kiwis, but now he can't fit it in at all. What I offer him, his mouth refuses to open, not even trying. I give him canned fruit puree, he eats well. What should I do? Close my eyes and wait until there's a little interest? Has anyone had this problem before