Food/drink supplements for 19 month old...suggestions?!

I’ve written on my struggles as a FTM and my daughters eating habits. I really want to ensure she gets the most out of a well rounded diet as possible, and lately that has been a struggle.

To fill the “holes” in my daughters diet, I’m looking for a supplement in hopes to give her as much nutrients as possible. Any suggestions?

I have a friend that sells this reliv now kids chocolate shake, but it has soy in it. And I really wanna stay away from soy since it’s basically just a GMO now. Attached is a picture of her suggestion. It all looks good except for that and it does have 15g of stevia. Which I think is a little much..please any advice or things that you have used, I really appreciate it. I just want to start her off on the right foot.💕