OFC #WireGuard may have done so since there are some #ISPs that do #CGNAT + #Tunneling i.e. [#L2TP on #DSL is common in #Russia to prevent people from 'blueboxing' by splicing the phone line]...
And in some Corporate setups this may even be desireable to have all the remote workers not able to #P2P as to mitigate #malware propagation...