My 1 year only likes cheese puffs fries and juicy juice and is a picky eater so this is funny to me because I have the same problem at home 😂

You can try watering down his apple juice who is mostly water and little bit of apple juice. I'm sure it's just a phase that he will get over soon. My daughter has always been the food picker. To this day she still doesn't need a lot at all. No she's not picky about what she eats she just doesn't eat much. She'll have a bite or two of each food on her plate then she said she's done it also takes her a very long time to eat. I think if you cut out snacking and water down his juice he might start to eat more because he will be hungry and he'll have no choice but to eat what's in front of him. He might not eat a lot and that's okay. My daughter is the same but she is completely healthy

Theres times my daughter wants to only snack. So aside from healthy snacks like fruits, string cheese, yogurt, etc. . I will cut her off from snacking. She will then eat what i usually end up serving her for lunch / dinner.

We also only keep milk and water at home so she has no other options.

When we go out is usually when she gets a free pass on drinks and snacks 🤷🏻‍♀️😂

Have you tried fruit? Or those veggie/fruit pouches?