What is a waist strap to put a carry on bag? I have crushed bones.
There are luggage carts which run on two wheels and have a waist strap.
It is hard to find them online, only one for sale (as far as I found them) and that one is not for sale yet.
But I have seen earlier versions in the past, so long ago that google can not find the photos from the few details I remember.
You can also buy a shopping trolley or the right kind of bike luggage car (which looks like such a shopping trolley) and adjust them. Add a connection to your waist, remembering that is has to be easy to remove it.
Or, you can ask for assistance at the airport, as they will help you with your 'more standard' luggage.