Apple has added a new configuration option for the M1 Mac mini to its website. It features a 10 GbE port. This option is $ 100 more expensive than the 1 GbE option. Note that port replacement is only available as a factory option and cannot be performed after purchase.
Thus, the information that appeared in November last year was confirmed. Recall that then motherboards for the Apple M1 Mac mini with 10 GbE ports were seen in the list of spare parts intended for Apple authorized service centers. Why the 10 GbE port was missing from the Apple M1 Mac mini computers that have been sold to date is unknown.
While a post-purchase upgrade is not possible, as mentioned above, there is a way to equip existing M1 Mac minis with a 10 GbE port. This is done by plugging into the Thunderbolt 3 port of an appropriate adapter, such as the $ 149 OWC Thunderbolt 3 10G Ethernet Adapter.