Irrelevant, given that she'd hired it, not bought it.
Privately owned e-scooters are not allowed on public land. If you buy one, you must only use it on private land (yes, this gets flouted massively but it's a different issue because of the differentegal status).
Hired e-scooters are the only ones which are road-legal and a driving licence is mandatory.
In the instance in your post, it was a hired scooter.
I don't actually know what the penalty would be for riding a private scooter on the road drunk.