Why haven't we been able to see もっと見る of Ursula's powers?

It really pisses me off that we never got to see もっと見る of her powers! She's a sea witch! She's supposed to be all powerful and even もっと見る powerful then her father! All we got to see was her tentacles and if anything else, she used magic to attempt to get her 歌う voice back. We never got to see her wreck havoc on the ocean with her powers! We never got to see her conjure storms または do underwater potions または anything! I hate it when a character is only described as extremely powerful but it's never shown!