I think I found what you need.
But you will have to download the driver source from Realtek, compile it, and install.
This is what you need to do:
Quickpet program icon on desktop.
Quickpet -> Useful -> devx and kernel src
Download and install:
devx fossapup64_9.5.sfs
Kernel_sources-5.4-53-fossapup64.sfs
Quickpet should handle the download and loading of these two sfs packages, so they are part of the file system.
To be sure, check in menu -> Setup -> SFS-load-on-the-fly program, to see if they are listed in the right side list of mounted sfs's.
If not listed use this program to load them.
This provides everything needed to compile software from source.
Now to get the driver source package.
Go to the Realtek web site.
https://www.realtek.com/en/component/zo ... s-software
Download the linux driver GBE Ethernet LINUX driver r8168 for kernel up to 5.17
https://www.realtek.com/en/directly-dow ... 6bcc027928
Now you have to un-compress the driver package.
Go to location you downloaded it.
Right click on the r8168-8.050.03.tar.bz2 file.
Select UExtract
This will run the UExtract program window.
Do not try to figure-out anything.
Just select OK.
In the location of the r8168-8.050.03.tar.bz2 file you will now find a directory named r8168-8.050.03.tar.bz2.extracted.
Now lets compile and install the driver.
Click on the r8168-8.050.03.tar.bz2.extracted directory to open it and show contents.
Will find a directory named r8168-8.050.03
Open it.
Inside will be a file named autorun.sh
Right click on it and choose from right click menu Run In Terminal
A terminal should open.
Should see info about what it is doing and show completion.
The driver should now be installed to be used.
Reboot the computer.
Making sure to update the fossapup save, so the driver is now saved.
Now try to setup a network Ethernet connection.