Umbrel not finding network-card / drivers?

Hello
I installed umbrel on a Asus nuc 14 essential.
Install went well but after that it didn’t connect to the network.
After trying to solve it for a while I finally tried a usb-c to ethernet adapter and it connected with no problem.
It works like a charm now, but I would like to use the built-in Ethernet instead of the adapter.

Do you have any suggestions on how to solve this?
Could it be missing drivers?
The computer has a Realtek ethernet controller RTL8125BG-CG, 2.5G.

Had the same problem with the same device. I used a USB NIC to get access, as you did.

sudo apt update
sudo apt install build-essential dkms linux-headers-$(uname -r)
cd /tmp
wget -q https://github.com/MONaH-Rasta/r8125/releases/latest/download/r8125_amd64.deb
sudo dpkg -i r8125_amd64.deb

Make the driver install persistent.

sudo update-initramfs -u

Reboot the device.

Confirm your NIC now has an IP.

ip -o -4 addr show | awk ‘{print $2, $4}’

Realtek r8125 now working correctly.