See this post about using FakePCIID for your Broadcom Ethernet port -
https://www.tonymacx86.com/threads/fakepciid-broadcom-bcm57xx-network-oob.155984/
Make sure you remove all the other 'methods' you have tried before you do anything, as some of the other 'Method's' if still present in the /CLOVER/kexts/Other folder, config.plist fixes, or kexts installed to /Library/Extensions or /System/Library/Extensions may cause the FakePCIID kexts to fail.
Just for clarity the two kexts should be added to your /CLOVER/kexts/Other folder.
You will need to repair permissions and rebuild the kext cache, after you remove/delete any kexts from /L/E or /S/L/E.