Yes, HK is treated as its own country for chargeability purposes, which AFAIK has never been subject to additional delays. Macau is treated as part of Portugal, so it will also never have limitations.
Both of those are specifically provided by Congress as exceptions to the general rule of charging to the current sovereign of the place of birth.
Both of those are specifically provided by Congress as exceptions to the general rule of charging to the current sovereign of the place of birth.