That's a weird listing. Pictures say geared, but text says non -geared:
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Building a wheel from a hub is way beyond me anyway, though. So that would be a no-go for me. It takes me 3 days just to true a wheel due to all the fiddly spoke tension adjustments. And that's way easier than calculating the spoke length, thickness, and pattern and buying all the right stuff like rim and nipples to build one.
Personally, I'd just go with a vendor that will let you order a certain size wheel built for any motor you buy. Then I'd buy a rear wheel in that bike's existing tire and axle size to avoid the strange front end suspension. Have done that plenty of times. Even for just acoustic bikes, since I prefer Nexus IGH hubs instead of exposed gear cassettes. Grin has a lot of info on Brompton conversions, which is an even smaller wheel, so it must be possible:
The brompton is among the most iconic folding bikes in the world and has earned a well deserved reputation for its clever design. We have both geared and direct drive motor front options specially made for the Brompton fork which allow you to convert your Brompton into a high-performance machine.
ebikes.ca
Barring that, just swapping out the front fork like Chalo mentioned to have a more common wheel size and no bizarre linkage suspension would be easier for me than building a wheel. It does have a bunch of fiddly bearing work, though, so I usually avoid it and just buy my frames with forks already on them.
With how cheap frames are off Facebook marketplace; and how experienced I am swapping out wheels, cranks, pedals, bottom brackets, cassettes, front cogs, chains, headsets, chain tensioners, cabling, and brakes; loss of a fork is equivalent to loss of a frame for me. I have forkless frames hanging off my garage ceiling even now where I don't know the right diameter fork steering tube and crown races to buy to fix them, haha.