Redirect www to non-www pages

Hello,

We have a specific situation where we need to redirect certain www pages to non-www URL.

Example:

https://www.website.com/about-us/
needs to redirect to
https://website.com/about-us/

I’ve tried setting up a simple 301 redirect but it doesn’t work as the URL still loads the www version of the site.

Am I missing something here? Is it possible to implement this kind of redirection via Redirection plugin or do I need to edit htaccess manually for specific pages?