https://wccftech.com/it-is-possible-to-upgrade-the-ram-and-storage-of-your-m1-mac-after-purchase/

Apple should give users the option to increase their Mac's RAM. However, while it chose not to do so for the M1 series Mac, technicians in China have reportedly succeeded in their attempts. According to the latest, technicians in Guangzhou, China have made it possible to upgrade the RAM and storage of Apple's M1 Mac. It is stated that the company's integrated custom silicon for the Mac might be flexible when it comes to customizing the internals.

The international reports have clarified the situation that the memory and storage of the M1 Macs can be upgraded - a notion that was previously up for debate. The news was circulating on Chinese social media throughout the weekend. The technicians replaced the RAM and SSD chips from the M1 Mac with a larger capacity module. The best part is that the chips were correctly recognized by macOS and the device did not adhere to any problems.