functions.php

<?php
//remove <?php when you paste inside your functions.php file

function admin_login_redirect( $redirect_to, $request, $user ) {
   global $user;
   
   if( isset( $user->roles ) && is_array( $user->roles ) ) {
      if( in_array( "administrator", $user->roles ) ) {
      return $redirect_to;
      } 
      else {
      return home_url();
      }
   }
   else {
   return $redirect_to;
   }
}

add_filter("login_redirect", "admin_login_redirect", 10, 3);