For all browsers made in the last 10 years, SNI is sent as part of the SSL/TLS handshake, so the hostname of the site you are trying to connect to is included i

For all browsers made in the last 10 years, SNI is sent as part of the SSL/TLS handshake, so the hostname of the site you are trying to connect to is included in the ClientHello and is visible to anyone that can monitor the network.