Bikes and electric scooters are good at providing last_mile access.

In Copenhagen it's free to bring bike on subway trains. So a lot of people bike from home to subway station, take the subway, and then bike the last part from subway station to work.

Bikes work in Copenhagen because of all the seperate bike paths.

The metro also work very well as it is driverless trains which means it has very low marginal cost to run more trains in rush hours (and during night time) and when there is an unexpected high demand for trains.