/*
Plugin Name: Exclude pages from admin
Plugin URI: https://www.johnparris.com/
Description: Removes pages from admin that shouldn't be edited.
Version: 1.0
Author: John Parris
Author URI: https://www.johnparris.com/
License: GPLv2
*/
 
function jp_exclude_pages_from_admin($query) {

$blogpage = get_page_by_title( 'Blog' );

  if ( ! is_admin() )
    return $query;
 
  global $pagenow, $post_type;
 
  if ( $pagenow == 'edit.php' && $post_type == 'page' )
    $query->query_vars['post__not_in'] = array($blogpage->ID); // Enter your page IDs here
}

add_filter( 'parse_query', 'jp_exclude_pages_from_admin' );

// Remove the Edit link from the admin bar
function jp_remove_admin_bar_edit_link() {
 
  if( is_page('blog')) {
     
    global $wp_admin_bar;
    $wp_admin_bar->remove_menu( 'edit' );
  }
}
add_action( 'wp_before_admin_bar_render', 'jp_remove_admin_bar_edit_link' );