Consider the cost of a new EV, and the insurance, the end of the federal EV incentive program this year and what an Uber driver makes these days, and it may not be enough of an incentive. Certainly, Uber trips are probably an ideal case for electric vehicle use (short trips, lower speeds with stop and go regen braking) but the economics of Uber driving are probably pretty touch and go from the various reports I am reading. (I would like to hear from Uber drivers directly on this matter)
Most Uber and Lyft rides I've taken are in older, well maintained cars. They probably are owned outright or the payment is reasonable. Insuring an older internal combustion car is cheap. Yes, there is a savings in fuel with an EV IF you can charge at home most of the time and you have an EV discount with your provider or you live in an area where electricity is cheap to begin with, but often the other costs can outweigh that. Just looking at the payment and insurance for my wife's (purchased used for around $30k) Tesla, and I am not sure if there is any financial savings in the fuel costs in the end, compared to my high-MPG Mazda3 which is paid for and is cheap to insure, and has had almost no maintenance needed since new, No one who is just getting by is going to do it out of the the kindness of their heart for the environment.
You also have to consider the shelf life of the battery, and amortize the cost of the car over time. A lot of these things don't matter if it's your personal vehicle and you're getting enjoyment out of owning an EV on top of it being useful, but if you're looking at it as a business case that you depend on for your survival, it's a different matter.
Any rideshare drivers here who would like to comment? The above is speculation based on my own experience owning both types of vehicles at the same time, but not as a rideshare driver. I have more questions than answers.
I think this incentive would appeal most to someone who lives in a household with multiple incomes, where the rideshare income is supplementary to another, higher income. Then it would be an incentive for someone who can actually afford to take advantage of it. My three cents.