A port of Realtek's out of tree driver for the R8125 2.5G Ethernet chip to use dkms and be packaged with rpm.
Eventually, probably Linux 5.9, the in tree kernel driver will support this card.
Just install the rpm. DKMS should build it for your kernel(s).
sudo modprobe r8125 to load the driver, without needing to reboot, after it is first installed. It should load on boot automatically, as is normal for kernel modules for auto-detectable hardware like PCI-e devices.
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