I’m a minimalist traveler so I can only think of a few extra things that are packed.
Two 12’ cable for electronic devices. The length is important so it reaches across 3 public transport seats. It has a braided covering so it lasts longer than the plastic covering on the cord that comes with a cell phone, tablet, etc.
At this point we all have a Mophie cellphone cover with built in rechargeable battery. Protects the phone from falls as well.
My mini first aid kit that fits in a credit card holder. I get one use Neosporin and sanitizer/ alcohol prep packets from the doctor’s office, add a few Bandaids and done. Anything more and WDW’s first aid stations can provide.
A travel bottle filled with vinegar works in the rinse cycle when hand washing. A few Tide pods, and bookbinders to hang wet clothing such as bathing suits. Sometimes I bring a bungie cord to act as a clothesline. That’s about it. All hotels give you at least one disposable valet bags so I use them as individual dirty laundry bags.
Each of us has one 25” wheeled carryon and if everything you want to pack doesn’t fit, you obviously overpacked.