An e-bike is one of the few places where DRM is actually attractive. I don't know the state of DRM on batteries, but I would feel significantly more confident parking an e-bike if I could remove the battery, and know that a replacement battery had to be paired with the frame/motor from a reputable dealer. Listing a bike as stolen would prevent this. I know that DRM can be cracked, but this would help a lot. note: I don't currently own an e-bike.
Note how infrequently iPhones are stolen since apple got serious about preventing it.
I have a theory that removing the battery and locking it well is enough. I'm testing that theory by storing my electric scooter with a quick release battery (Hiboy x300) with a D lock and a chain in the same bike room my roommate has their bike stolen out of (they only had a cable lock).
Note how infrequently iPhones are stolen since apple got serious about preventing it.