Anyone else struggling to get their LO to eat solids still?

My LO just turned 1 today (Yay! 🥳)

However, we are still struggling to get him to eat solids. I know he isn't eating enough veggies, and we are working on the fruit. Milk and dairy has also been difficult. He gets the runs when we try to introduce most milk products. Cheese he is usually ok with. Yogurt sometimes will upset his stomach but other times its ok. We have had no success with cows milk yet.

Because its been such a struggle, he still has 3 bottles of formula a day. His typical meal schedule is:

Formula when he wakes up

Breasfast (typically oatmeal)

Snack sometimes but most of the time he rejects it. When he does eat snack he has a little fruit.

Lunch - usually yogurt with something like French toast or healthy homemade muffins with veggies hidden inside, or eggs with toast

Formula

Snack - usually fruit again or cheese and toast, but he sometimes rejects it

Dinner - whatever we are eating unless it's something I know he doesn't like. Usually a protein, veggie, and starch.

Formula before bed

When he actually eats, I think he's ok. But he often fights eating. For example, his dinner tonight (pork, potatoes, peas) he just kept spitting back out. Its so hard to get him to eat. And he used to be such a good eater too 😭 im worried about cutting out his formula because I know he does not eat a balanced enough diet with him rejecting foods and not having enough dairy. But I also wonder if the formula may be why he rejects some foods? I also wonder if his digestive system just still needs time to mature maybe for him to handle dairy and stuff better? Idk. This all gives me anxiety 🤦‍♀️

He has an appt with the pediatrician this week, so I will talk to them then. I am just curious what everyone else has been doing