In what way does the suspension require regular servicing or an online connection to a server to function? That would be the only reason to offer it as an ongoing service cost.
Otherwise, you’re just paying extra for something already in your car, not for an actual service, which would make no sense?
What next, paint ongoing service fees for having wheels? Not even for ensuring they’re regularly replaced, serviced, or repaired, just for the ability to use them at all…