[the8472]

There are foldable bikes that are easier to take on public transport.

[jdnenej]

They are still massive compared to a folded scooter

[Symbiote]

Not really.

A child's kick scooter is small, but adult sized electric ones are long and fairly bulky.

A folding bicycle is roughly backpack sized, and easy to stand over (like a backpack) on a metro train.