I spoke with VW Customer Care and mentioned the unavailability of the online owner's manual. To my surprise, a few days later, the rep called to advise me that the ID.4 manual is now available. Go to this link: Volkswagen Online Owner's Manuals | Official VW Digital Resources
and enter your VIN. If the system does not recognize your VIN, Customer Care can direct someone to make sure your VIN is in the system. (The rep I spoke with thought that the VIN did not get into the system until after the car is sold and there can be a delay.)
HOWEVER . . . The "Digital Owners Manual" is not a downloadable PDF file. It is simply a site so, while you can access it and find items with the search function, you cannot download it for access offline. If someone knows how to get around this, please post instructions.