Chinese machines are already making inroads where they aren't banned. You can get a lot of decent construction equipment from there too. That's the danger here, by the time Western companies get around to producing EV tractors with all the advantages they bring, the market will be saturated with mature and competitively priced products.
As for durability, some EVs have proven to be very fixable. Nissan Leafs are a good example. Relatively simple, not difficult to work on, drivetrain that is separate from everything else and highly maintainable. Again, the Deeres of the world are screwing themselves with all this DRM bullshit that stops people fixing their products.