People tour on Bromptons, such as Heinz Stücke, who stayed on a tour for 50 years,
because he wanted to see everywhere.
he used a regular bike, at first.. , not even a "touring bike"

then a bike friday pocket Llama ( folds to pack in a suitcase for travel, but too slow to catch a bus)

and finally a Brompton, which is made to fold quickly for multi mode travel..

Rear rack , A full sized backpack standing up .. + Brompton's, excellent front touring bag offers plenty of space

you will find dealers for Brompton in most countries , by now..

they sell well in Asia, and those places have an after market
in superlight substitute parts made in those countries ..

Brompton Specs for Touring ? The Path Less Pedaled
....