Maybe not even make a civilian version, just allow people to buy the military version. When Arnold Schwarzenegger bought a military Hummer back in the day, they weren't selling civilian versions. I don't know how much he had to do to make his truck road legal, but I wouldn't be surprised if he had to do something.

Schwarzenegger bought his because he wanted a unique vehicle, one that almost nobody else had, and that was a true military vehicle. Ukraine could probably raise money from people who wanted the same thing. Sell them the same bike that is being used on the battlefields of Ukraine at a significant mark-up, and let them show that by their purchase they're also supporting the Ukrainian efforts.

There are hundreds of electric dirt bikes already out there.

Them being silent has already lost the demographic of engine-revving boyracers, who want their thundercock to be imposingly loud.

It would make a nearly ideal wildlife spotting tool so long as you kept things to a safe speed.

For highspeed stuff I imagine they will have to come up with some kind of artificial noise to warn animals like a low hum or something.