You can sometimes work around parts of it. For example there are still taxi dispatchers you can call (but with what? Maybe if you have at least a dumb phone ...) but drivers might be more hesitant to accept those jobs (less precise pickup locations, more ambiguity about destinations etc.). You can rent some of the public bikes using a public transport card, but none of the scooters - and those are much more available.
In highly modernised places there is simply a baseline assumption about the tech that everyone has available to them ...