Does somebody experienced a page with 410 status code in index?
Could you imagine, that an indexed healthy page, which is set to 410 only through adding of
<?php header( "HTTP/1.1 410 Gone" ); ?> remains still indexed?
After adding of
<?php header( "HTTP/1.1 410 Gone" ); ?> to the beginning of the source code, tha page remains the same, but fires status code
410 Gone, as shown on the screenshot - look at DevTools: