Did you tried different texture, taste (more flavour like more sweet). My LO don't like puree but more solid texture.
What about snacks? Is he interested in snacks?
Sometimes some LO eat snacks but not meals, mean they are picky instead of not interested. Hence have to keep intro them fruits.
If can, let them BLW, let them play with the food while they get to taste them as LO this age like to put things in their mouth too. Once they feel the taste, soon they may get interest.
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Leader of 2 pumpkins