I've met a few people like that in various hostels in Georgia and Armenia during off-season, traveling with their backpacks and their laptops. They usually survive by teaching english to rich russions or chinese online.No-idea how they're faring with covid though. They would usually pendle between some low prize country and travel with the seasons. One person i met had an actual job at a company and did their daily online conference on their hostel bed with a sheet as divider and everyone else sent out.

It's probably a pretty ascesic lifestyle, as you can't afford a lot and won't have a lot of physical possessions. Must be freeing though.

It is probably not the kind of digital nomad you're talking aboit but they're the ones i've met.