Move dashicons.min.css to Footer

by

Please try below code :

add_action( 'wp_print_styles', 'my_deregister_styles' );
function my_deregister_styles()    { 
   wp_deregister_style( 'dashicons' ); 
}

Replace your css path “PATH_OF_CSS” :

add_action( 'wp_footer', 'register_wp_footer', 11 );
function register_wp_footer() { 
    wp_enqueue_style( 'dashicons', 'PATH_OF_CSS' ,array(), false, true );
}