SNI has nothing to do with proxies. Essentially all HTTPS connections provide SNI, regardless of whether there's a proxy or not. A MITM can sniff the SNI. Ther

SNI has nothing to do with proxies. Essentially all HTTPS connections provide SNI, regardless of whether there's a proxy or not. A MITM can sniff the SNI. There's a draft standard to encrypt the SNI. I don't think it's been widely adopted.