Email not sending in laravel 7 - laravel

Question

when i am using
MAIL_MAILER=smtp
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=xxxx
MAIL_PASSWORD=xxxxx
MAIL_ENCRYPTION=tls
MAIL_FROM_ADDRESS=xxxxxx
MAIL_FROM_NAME="${APP_NAME}"
so it is giving this error
Connection could not be established with host smtp.gmail.com :stream_socket_client(): unable to connect to tcp://smtp.gmail.com:587 (Network is unreachable)
while when i am using
MAIL_MAILER=sendmail
MAIL_HOST=smtp.gmail.com
MAIL_PORT=587
MAIL_USERNAME=xxxx
MAIL_PASSWORD=xxxxx
MAIL_ENCRYPTION=tls
MAIL_FROM_ADDRESS=xxxxxx
MAIL_FROM_NAME="${APP_NAME}"
so then error is not showing but email is not receiving on the other hand so please anyone help me here in this issue that where i am doing the error
Controller code is
Mail::send('email.username_email',['data'=>$data],function ($message){
$message->from("xxxxx", "HCML Lab");
$message->subject('UserName Change');
$message->to("xxxxxx");
});