I am moving a Wordpress site to Drupal and want to ensure that proper 301 redirects are in place for SEO purposes.

The old urls are in the form of: http:www.domain.com/?page_id=123

I was hoping this would be simple enough with the Redirect module, but when attempting to enter a path such as ?page_id=123 I see the following message.

The source path /?page_id=123 is likely a valid path. It is preferred to create URL aliases for existing paths rather than redirects.

I want to be absolutely sure that a 301 redirect is created but I am unsure that adding an alias is the correct method for this.

Another approach I have considered is adding the following code to the .htaccess file in the web root.

Redirect 301 /?page_id=123 https://www.fencingsupplies.co.uk/node/321

Again I am unsure if this approach is recommended for Drupal 8.

So what is the best approach, so the new Drupal site does not risk its good standing in search results?