Have same problem
Root cause - Board Version 1.21 with new NIC chip rtl8211f
Solution from RADXA forum does not work.. :+(
https://forum.radxa.com/t/rock-pi-e-board-version-1-21-ethhernet-not-working-in-armbian/15061/3
Dear maintainer. Pllease make special build for 1.21 board revision..