Thanks, setting the MAC address to global bit works on my Moto Android 15, Honor Android 9, and GSI 16 from a Raspberry Pi [1].

It now appears as eth0 and routes created only after turning off the Wi-Fi, DHCP is obtained regardless.

ECM scores 270Mbit, RNDIS 150Mbit.

Mobile hotspots/dongles with MAC address modification should work. (currently detected as usb0)

[1]: https://gist.github.com/TalalMash/c20e6aa237e1f123ddf9686a07...