Big problem with PPPoe Ethernet in Android 9 (rock pi 4b+)

Hi, PPPoE Ethernet in Android 9 (login & pass) - how to enable?
ROCK Pi 4B+ (Android 9 HDMI 4K)

No PPPoE option in Ethernet settings. Only DHCP & Static.
Although in /etc/ppp/ are PPPoE files.

How do I connect to the network?
Make a patch PPPoE AOSP for TWRP.

Android 9 (HDMI 4K), rockpi-4b-rk3399-android9-20200827_1006_94736e8-gpt

Any solution to add PPoE to TvSettings, Settings apps?