Not eating as much

My son will be 7 months on the 16th and we’ve been giving him food since 4 months. He only has purées, I’m not confident enough with blw.

Anyway he’s always been really good at eating, he has breakfast and dinner everyday. He’d always eat a whole pouch!

Past couple of days when I’ve made him breakfast or dinner he just cries, has maybe 5 spoonfuls then just refuses to eat the rest.

I don’t really know why he won’t eat