You can reset individual counts on pages/posts, but there’s no “wipe all counts” button at the moment.
If you know a little SQL it’s not hard to do though.
Thank you very much for your reply. How would I go about resetting individual counts?
Open the post/page you want to reset, there will should be a panel called “Just Likes and Dislikes” displayed that will let you set the like/dislike counts manually.
If the panel isn’t displayed, go to the three dot overflow menu in Gutenberg, select Preferences, then Panels. In the Additional grouping it should be listed and if disabled, enable it.