I just purchased this device, it show x60 US ver 4.2, after that I got an OTA update version 1.5.0 Build 20250801 Rel. 55258 I can't find these info on web, US only have ver 4.6, EU have v4.2 but no 1

I am using 3 pack of deco M4 which running beta firmware 1.7.0. The connection preference function is working as expected. However, I want to enhance the speed by wiring them together to use ethernet