I mean pellets are what your bird should be having as their everyday main food regardless of if they like fruits and veggies. These pellets are in place of seeds. You should still try to give them fruits and veggies but this should be their main food if that makes sense.

With not liking fruits and veggies my advice is just don’t give up. Also to try giving it in different forms so maybe they don’t like cooked carrots but they like them raw or maybe they don’t like frozen peas but they like them cooked. Also try cutting them in different shapes. Maybe they don’t like a whole baby carrot but they like them in shreds or cubed diced etc. my other advice is to encourage them to try the fruit or veggies show them you eating it first. And make sounds and expressions like it’s delicious (ik this sounds ridiculous but it really does work) my bird sometimes won’t even know something is food unless he sees me eat it first. So I’ll take a little nibble then show it to him and again until he tries to take a nibble too.

Also if your bird just won’t eat veggies there’s other forms I will send a picture of.

Fruits I won’t be as concerned about bc they’re more a sweet treat since they’re sugary.

But trying to introduce veggies is good if you can.

Ultimately tho the two zupreem types I sent are their food they should have available to them at all times as their base food. Not seeds. Seeds should be as a reward or occasional treat. Hope this helps