from what he said I guess not.
worst case you only have rear brakes, which is not ideal.
You can always get a cheap fork with a disk brake mount and swap it on I think or just another bike, they aren’t much.
Any fork without a disk brake I’m not sure is up for a hub motor.
I was trying to put it on a bike without disks but It never even fit on so I can’t say about the brakes.