Yes. User freedom is not all-or-nothing. There are degrees, and the tech companies are coming up with fiendish new ways to lock away your data from you. So in the case of passkeys, you can technically move your data between vendors, though that can be quite inconvenient as the submitted article mentions, but nonetheless every vendor locks away your data from you, and most vendors have a financial incentive to keep your data away from you, so that you have to pay for the services.
Once "secure credential exchange" becomes supported by commercial credential managers, what's to stop someone implementing an open source password manager that implements the standard and allows local export in plaintext?