For my two, when they got super picky, I would involve them in the grocery shopping by having them look at recipes with me, making it a game for them, like, let's find something that you think will taste good and we can go to the store to get the ingredients. Depending on her she, you could even get her involved in the cooking. When my five year old was two, I would have her help me stir things. Hope this helps

Pedisure...or liquid vitamins in drink can't taste it

Oh and another thing is that if you eat out a lot, just keep in mind that they will probably have a more difficult time eating homemade food. When we moved and didn't have a home yet, we ate out a lot. Our hotel didn't have a kitchen or anything so that really was hard. I think your tastebuds and brain get used to that 'yummy' fast food lol. I cook a lot now that we are settled in our new place and it's been a struggle but I've cooked him up stuff that he used to like and sometimes just sometimes he will eat something new even if it's a bite or two :)

I completely understand! My son was a wonderful eater until just before 2. Then we ended up moving back to the states and his whole routine and not having any household goods and living out of a hotel for a month just completely screwed us lol. The only meat I get him to eat is chicken nuggets or strips from fast food. I tried making them myself or buying the frozen kind. He literally won't even touch them😒 he stopped eating pastas or any grains except for oatmeal and dinner rolls (the Hawaiian kind) He does eat some fruit like banana, strawberries and blueberries. I took him to a farm recently and showed him how to pick the blueberries himself and he started eating a bunch so maybe seeing where your food comes from helps? My biggest suggestion that worked for us was to just put on your finger the sauce or the seasoning of what you're trying to get them to eat, and just swipe it on their lips or in their mouth so they have to get that taste. I can't say that's the smartest thing to do though as I believe some kids would hate food because of that but it works with my son. Also, stuff what you're trying to feed them in something they like. For instance, my son loves dinner rolls so I cut it in half and put a piece of chicken or some kind of meat in it and then squish it down like a sandwich and cut it in small pieces. As long as he can't see the food inside hanging out then he will generally eat it or just attempt to try it until he realizes I tricked him. That's all I got for you. I know I feel terrible if I ever let my son go hungry but the other day he refused to eat his oatmeal and kiwi for breakfast or any snacks or lunch. By dinner he was so hungry so we ordered a pizza (since he used to actually eat that but would anymore ) and he ate 2 slices on his own and then kiwi afterwards. Sometimes they need to know you aren't going to give in to whatever they want. I always make him food so he won't starve and make separate meals because I know he won't eat what we eat but on that day i realized that if he's hungry enough he would eat something. I recommend that you always start giving your kid something that they used to love, and also one meal a day offer something they do like on the side but not a lot.
I understand this pickiness and I hate seeing him being like this and it's so hard because he hasn't gained any weight :/ pediasure he will take and gummy vitamins because he thinks they are gummy candies lol. I'll have to look into that instant breakfast stuff.
Sorry for the long reply. Just wanted to let you know that you're not alone and give you any help that has worked for us either in the past or now. We are a long ways from him eating the way he used to but as long as he eats one food that he used to eat at least to try it, then i just celebrate those little accomplishments 😄

I hope he can. I know how it feels when your kid doesn't want to eat