Regarding the height of KK Arnold...
In this photo (scroll to the bottom) from the Philippou article on her in the Hartford Courant, KK appears to be the same height as Geno.
She was listed at 5'9" on the USA U16 team last summer. Here's a link to the U16 team with a gallery of photos.
Images from the 2021 USA Basketball Women's U16 National Team photo day.
www.usab.com
KK is #5. In the last photo in the gallery, photo # 21, she is, I believe, seen posing next to Olivia Olson-- who is listed at 6'1" KK appears to be about 4-5 inches shorter than Olson.
So 5'9" may be correct. Of course, I don't know how tall Geno is.