Hello @benjamin-tang-pusher
I've found out your question regarding proxying of NWConnection when used with WebSocket here: https://developer.apple.com/forums/thread/684489
Could you please share if you were able to make NWConnection to work over proxy when configured to perform WebSocket connection? So far I have no luck. This is very strange for me that plain old TCP connection over NWConnection is proxied by default, but then suddenly broken if I change NWEndpoint from NWEndpoint.HostPort to NWEndpoint.URL with scheme wss (scheme https works over proxy).
Thanks a lot in advance!