OP, I have the one you linked from target which I love and we also have this one that was recommended on this site:
biaggi Carry Cube Backpack: TSA Approved Travel Bag with Removable Packing Cube, Lightweight & Durable for Personal Item Use
https://a.co/d/bwNJ6mt
I personally like the target one better because there’s more pockets, a laptop sleeve, etc., which makes it more versatile for both business and personal travel. Definitely go look at the target one in person. Lots of little pockets and areas where you can put in other personal items. When we traveled internationally, I had a Crossbody bag, and I kept that in one of the pockets with passports, phone, chargers, etc. it was easy to quickly stuff back and the backpack for storage during the flight.
I’m only 5’4 and did not have an issue with not enough leg space but I could see if you are a tall individual why you might want more foot space on a flight unless you’re traveling business class or economy plus.
My husband carried the smaller biaggi backpack linked above, and I just didn’t find it versatile enough.