We use normal plates that we use for our toddler but different cutlery (ones that have Spider-Man and diggers on them 😂) We also make sure we sit down with him at meals and eat at the same time.
I wish colourful plates helped my daughter to eat better, even with me using one she is still fussy about her food x
We let him choose whenever possible. He often wants same as us. We let him apart from the knife.