Fair enough, I should have said that there's no other built-in way to set the time on them.
I work with 3d printers in a school that uses its own NTP server and blocks other requests. The only way I managed to set the time on the machines sort of using a raspberry pi or something, was to connect them to my phone's hotspot.
I've opened an issue asking for a manual offline way to set the time, and I saw another one asking for a DHCP option.
I've tried asking the admins, and they were mad I connected the printers to the network to begin with 😅