I'm aware, but it's not a very clean solution. Now you need a USB-OTG cable with charging and a USB ethernet adapter.
Also in my experience (which was admittedly limited since it didn't work well) it was very crashy, with the connection going down after a few hours. Probably a quirk of my specific tablet or ethernet adapter but still it's a potential problem.
You can get USB-OTG cables that split off so you can plug in a charger, but I think (not sure) that it's not universally supported to use USB-OTG and charge at the same time.
This got me curious: I tried to plug ethernet cable to a phone via USB adapter, and to my surprise, it worked!
Simply got a prompt to configure ethernet IP settings.
Disabled wifi and mobile data, web browsing via ethernet connection worked fine.