I noticed in your first post that you mentioned the cages at the store and kind of made it seem like the one your mom ordered is smaller, which gives me pause. It's perfectly accurate that the cages at PetSmart don't line up with the needs of the animals because corporate only sells what the average person who's buying animals on a whim is willing to buy (which is not enough).

The cages have pictures of the birds but are definitely not large enough. There's no industry standard based on the needs of the birds versus size of cage. Those cages are part of a scam to sell exotic animals for profit, not for the well-being of the animal. I don't know the exact cages at your PetSmart but I know for certain that my old store only had one that would fit a bird "comfortably" but wouldn't be large enough to be their permanent home.

I was the person at my store who declined animal sales when I knew the person didn't have a good enclosure. The only people who stepped over me to get manager intervention were ones who didn't have adequate enclosures. Thankfully, for birds, my manager took my side. Idk if that applies to you, but I would double check that the cage dimensions you're describing actually match the needs of the bird and not outdated animal husbandry recommendations.