What are you asking about? Is there a problem, such as the chainring able to tilt, move laterally freely, or rotate in a non concentric manner? If so, that's not normal.
If you perhaps mean that you're confused by how the chainring's attached to the motor, instead of spindle or crank, then that's normal. Sorry if this isn't it and my guess insults your intelligence; have to guess when you don't give much context to work off of.
The lockring was tight to begin with and the chainring was still loose, that was why I raised the question. The tech docs show no spacer, so it's either designed like this, or its missing a spacer that isn't shown in the tech docs, or it is assembled incorrectly although it seems to work fine.
I was hoping that someone who has an ebike with the Shimano E8000 DU could just check theirs and let me know.
I just took my chainring off last night and all I see behind the chainring is a circlip. I dont see a spacer. There is definitely something wrong there. There is a spacer between the chainring and the crank arm. Sorry I cant be of more help here.
I get the impression that the spider is merely offset by 3mm, to get the chainline optimized based on rear axle spacing (142 vs 148). I expect them to be made interchangeable with the motor, and not have incompatibility like how you speculated.
Thanks for the info ninjichor, it would make sense then that there should be a 3mm spacer on one side of the spider or other depending on chainline. This would also give one motor two chainline options. So I am guessing my motor is missing the spacer, but it is not in the tech docs anywhere. It would be great if somebody could look at their motor and see if there is a spacer on either side and if it is tight to the shaft.