To make life fun, there’s zero details on this board within Marlin at the moment.
You can try to make a post here: Issues · MarlinFirmware/Marlin · GitHub
Include whatever information you can find about the board - but likely, it’ll need the entire pinout figured out to make it possible to bring support for that board into Marlin.
As you’ve bought one, you might be able to ask Creality for the pinout files or the board source code - and attach that as well - it might be able to be imported from that.