I have tested with Realtek 8153 and Axis AX88179 (most common gigabit ethernet to usb 3.0 adapters) and no effect.
My realtek are (1: Vention usb-c hub 9-1, 2: Generic dongle usb-ethernet):
root@GL-AXT1800:~# lsusb
Bus 002 Device 003: ID 0bda:8153 Realtek USB 10/100/1000 LAN
root@GL-AXT1800:~# lsusb
Bus 001 Device 006: ID 0bda:8153 Realtek USB 10/100/1000 LAN
My axis is (Generic dongle usb-ethernet):
root@GL-AXT1800:~# lsusb
Bus 002 Device 005: ID 0b95:1790 ASIX Elec. Corp. AX88179
For Realtek 8153 you need kmod-usb-net-rtl8152, but not compiled for cortex-a7
For Axis AX88179 you need kmod-usb-net-asix-ax88179, but again not compiled.
https://downloads.openwrt.org/releases/21.02.0/packages/arm_cortex-a7/