Those are 2 of the oldest EVs, that's why I said "modern." These don't have great range and charge very slowly. I think they've both been updated a bit, so I hope they at least support modern DC fast charging now.
Looks like the LEAF still uses CHAdeMO, which is being phased out AFAIK. But its battery is so small that it still seems to give somewhat adequate charge times (45min to 80%).
The Bolt seems similar: slow charging system but tiny battery, which might be OK in city ride sharing use. And not sure anyone cares much for the size of an Uber, so might be fine? It's not like those old Priuses are amazingly comfortable or roomy or anything.