About redirect settings for dynamic pages
In Studio.Design, you can set up 301 redirects using a redirect page. However, with the current setup, dynamic pages such as CMS article pages can't be selected as either the redirect source or destination.
Here are a couple of workarounds you can try:
Create a static page with the same content as the dynamic page you want to redirect to, and set that static page as the redirect destination.
If needed, review the URL structure and content layout of your dynamic pages, and redesign your information architecture so that redirects aren't necessary.