I have added this code:
add_filter( 'generate_post_author_output', function() {
printf( ' <span class="byline">%1$s</span>',
sprintf( '<span class="author vcard" itemtype="http://schema.org/Person" itemscope="itemscope" itemprop="author">%1$s <span class="fn n author-name" itemprop="name">%4$s</span></span>',
__( 'by','generatepress'),
esc_url( get_author_posts_url( get_the_author_meta( 'ID' ) ) ),
esc_attr( sprintf( __( 'View all posts by %s', 'generatepress' ),
get_the_author() ) ),
esc_html( get_the_author() )
)
);
} );
But author link is still visible.
I flushed cashe.