I’ll ask my daughter “do you want to sit in the stroller or walk with the leash?” Knowing she will choose the leash but at least she’s making the decision so it doesn’t become a complaint
But with snacks she can sit in the stroller for a long time too
Collapsible Wagon or luggage seat?
Bribes 😬 I know bribing kids is frowned upon but just this once!
Or I’ve told my son that they don’t let children in the airport unless they’re in a pushchair. I know, terrible Mum! 🤣
Do you have a friend with one of those trike chair things. They still have a handle you can use but they also have handle bars and some have pedals so it's more of a toy for him but you can still get places? I say a friend as it would be good to try before you buy. They do fold up too although maybe not as small as a pram.
A trike or a backpack with a lead
Snacks ? Or a leash?