I noticed that in SkSw, TP, and the hylian outfit in BotW all have that weird middle wrap. Any idea what that is or why it’s there, or is it just a fashion statement?
I assume you're talking about this thing?
From a worldbuilding standpoint, it's something that started in Skyloft as a means of displaying your family crest! You'd be hard pressed to find a character that's wearing one without a crest, who isn't also training to be a knight. In fact, the only example of a blank one I could find on a civilian was on little Kukiel.
As the ages went on, the Skylians-turned-Hylians cared less and less about their family crests on their belts and instead displaying them on little banners hanging down, moreso wearing the stomach wrap because it was just the norm.
Compare it to the meaning behind barrettes, brooches, and hairpins in our own world. Across various cultures, they were prized heirlooms, saying that you had status and often sporting a family marker.
By the time we get to Breath of the Wild, it serves a more practical purpose. It works as padding against blows in the field, with pockets sewn into the inner lining. It's basically the late Hylian equivalent of a fanny pack adventure pouch.
If you want the real world reason behind it, though, it's a staple part of Japanese clothing!
The Japanese have broad silk belts to tie kimonos, and the more commonly worn yukatas, in place. The inclusion of it is probably supposed to instill a sense of casual familiarity in the Japanese audience; yukatas are worn at anything from hotels to summer festivals as a traditional casual wear.
If I had to guess, Nintendo initially used the belt as shorthand for "these people relax and live well, in simple traditional times," then incorporated it into future character designs. The looseness of it is also probably due to it not actually tying anything in place.
These ten ducklings were found orphaned and they were brought to a pet duck called Stella who had just hatched nine of her own two weeks prior. She immediately claimed the ten as her own.