To be used with Violentmonkey or another userscript manager.
Unhides all of your hidden posts on reddit. To start it simply go to old reddit and then to the hidden tab. The script unhides all posts from this page then reloads.
Select Install from URL
and use the direct link to the script https://github.com/danielvigaru/reddit-post-unhider.user.js/raw/main/reddit-post-unhider.user.js
or just click this.