Alright parents! I need some advice..

My little is 19 months has been eating solid food since about 8/9 months. Has been a picky eater since about… 11/12 months.. recently… she hardly eats! Some days she will eat like her whole plate but most days she just picks at it… then says “out” I ask if she’s not hungry she just yells “out!” (There are some times where I ask are you not hungry and she will eat a little bit more )

Some times she goes a whole day most has been 2 days without eating anything I put in front of her. (Besides snacks) but she’ll chug her toddler formula…

Has anyone else experienced this?