Should they have delayed the launch for an edge case that applies to less than 10% (in being generous here) of people that will be resolved before the holidays? Really?
No, I wouldn't expect them to delay the phone, just be open and say dual SIM / 5G will not work out of the box, and if it's the case, that a later software update will enable it. At least people would be changing their plans in full knowlegde of the situation