Hanples Travel Backpack for Women Men Large Carry On Person Item Flight Approved 17 In Laptop Backpack Waterproof anti theft Casual Luggage with 2 Toiletry Bag(Beige)

I have this one (https://www.amazon.com/dp/B0B8SG64GX) but it's the same design. The packable straps are a key feature when the gate agents start sizing everyone because you can tuck them away rather than have them dangle outside the sizer.

I looked at this spreadsheet from r/onebag. It has dimensions and other info for a ton of bags. This backpack on Amazon also looked like a solid choice.