LH Page Links To lets you make a post or page point to a URL of your choosing, on your own site or anywhere else, instead of its normal WordPress URL. Anyone who visits the post’s normal URL is redirected to the one you chose.
It started as a fork of Mark Jaquith’s Page Links To, rebuilt around the block editor with a simpler code base, and it redirects properly on password-protected posts.
Edit a post or page in the block editor and open the Page Links To panel in the post settings sidebar. Enter the full URL you want it to point to, including https://, and update the post. Only valid full URLs are saved; to remove the link, clear the field and update the post again.
Posts and pages that link elsewhere are left out of the WordPress XML sitemap and the LH HTML Sitemap. In the admin post lists, a Link Url column (hidden by default, available under Screen Options) and a filter for posts with or without links show which ones redirect.