This device hardware can support SIM+ microSD or dual SIM, however dual SIM functionality will not be available at launch. A software upgrade will be required for dual SIM functionality. For more information about dual SIM support, check www.samsung.com.
There is NOTHING on samsung.com about this. The listed phone specs just show that it’s dual sim, and no footnote that this functionality is not available right now, and/or when the software update will ship.
I contacted Samsung support by both phone and messenger, and they have no information about when this software update will be available.