Unclear if they are charged by battery swapping or being taken to a third location -- but either way in a world where they'd sell them would they not include a charger?

There are likely fewer chargers than bikes, and the chargers are not consumer friendly:

https://therideshareguy.com/wp-content/uploads/2018/04/7b019...

The motors likely use a relatively standard voltage/current & would very likely be amenable to a consumer e-bike battery— an expensive component, for sure, but much cheaper than a whole bike.

oh wow. Discounted that possibility!

There's always a way. It really depends on if the charge controller is onboard or in the dock.

A way, yes.

But it may be very expensive to design and manufacture a new charger, and they certainly don't want to sell the bikes to a bunch of techies who will stick random wires on them until 990 of them are happy and 10 generate news articles because they set their houses on fire with their hack.