I don't think it's the case. If the phone doesn't come with free screen protector, u will have to utilise the entitlement from ur Care+. Can't be they mention S24 series for the free replacement, then no one will eligible alr since none of the S24 series come with pre-installed protectors.
I think the Z4 series was the last to come with pre-installed. Subsequently, the Z5 series, need to visit the service centre to have the screen protector installed.