Baby refuse to eat solids

Hi mommies, my baby is 11 months old and he refused to eat solids. He used to eat breakfast, lunch and dinner with some fruits in between. But since 10 months old he start to refused to eat breakfast n then less for dinner and reduced eat fruits. I also noticed he is also teething but how long does teething last? Any recipe for picky eater and make him eat more and gain weight? Thank u.