Post expire date sidebar for Gutenberg it's a minimal plugin that allow to set an expiration date for posts
Post expire date Sidebar for Gutenberg will add a Gutenberg sidebar where the user can enable Post expiration by setting an expiration date and time and a status (draft, trash, private) the Post will revert once expired. Expiration date can be removed or rescheduled at any time. Post expire date for Gutenberg uses wp-cron to schedule the single event, please be sure you have wp-cron active on your installation.
You can print the expiration date and time inside a post, using the shortcode [expiration_datetime] inside your post.
Yes, this plugin was specifically made to add a sidebar in block editor.
It could be for a couple of reason: first you don’t have wp-cron running, please check your wp-cron is running (there are many plugins, like WP-Cron Status Checker); second, the way wp-cron is triggered is by site visit, scheduled events runs when the date they are scheduled is passed AND someone visit the site