As many members pointed out already, having a MAC device registered under a Chinese company is different than the device is reporting to China. A device’s MAC registration is agnostic to how it communicates to the world.
Wyze cameras are manufactured in China. Most of the camera parts are purchased from China too. Nova is one of the suppliers for out manufacturer. When our camera boots up, it has an original MAC like c8028f. Wyze purchased our own MAC range which register under our company name, they start wit A4DA, 2CAA, and may be others in future. During our device boot time, our program will ‘overwrite’ the device MAC to be a uniquely assigned Wyze MAC. We have see occasional report of device showing as c8028f MAC. It is rare and not none. This is very likely to be the ‘overwrite’ failed for some reason. We are chasing the issue but it hasn’t been resolved yet. No matter what MAC the device uses your device should be functioning fine (unless you have one MAC address blocked through your network).
For the question of Wyze devices talking to oversea servers, it is a totally different topic. We have explained a few times about the history and how we addressed the issue. We have a page released at https://support.wyzecam.com/hc/en-us/articles/360027279571-ThroughTek-User-Privacy. Thanks!