I’ve noticed a lot of dragonite art and even in my pokedex has smaller wings… but my dragonite has very large wings outstretching my 5’4 body. Is there a reason for that?

The art you see of dragonite—as well as the photographs in the pokédex—are just one example of what a dragonite looks like, anonymous. In reality, pokémon may differ from the examples in the textbooks, sometimes in subtle ways and sometimes—such as in the case of your dragonite—in fairly obvious ways. It all comes down to genetics, really.