No, but I thought I clarified that when I said it’s basically wireguard VPN which operates using tcp/udp (layer 3.) layer 7 is stuff like https. CF tunnels are lower level.
Page you linked is missing the layer between CF and source server so it doesn’t indicate layer. You can lookup wireguard protocol if you want more details.
You realize that all Soviet republics were part of WWII? A lot of the success was due to the fact that SU was able to throw millions of people (including Ukrainians) into the grinder. That same tactic is failing russia miserably because unless you only get your news from russian propaganda you will quickly realize just how many people they are losing constantly.