I wouldn’t worry unless he’s not having milk, keep offering different foods with no pressure, keep mealtime fun. My little girl really likes cucumber and corn on the cob when she’s teething, nice and firm and cold for their gums.
My baby keeps doing the same. Most of the food now ends up on the floor. He’s had a lot of 💩 nappies last few days. I’ve put it down to teething 🤷♀️