Check out https://kbin.social/m/RedditMigration/t/88918/Info-on-how-to-get-your-saved-reddit-data-and specifically to get your saved posts
Also check out https://kbin.social/m/RedditMigration/t/47320/PSA-If-you-have-more-than-1000-posts-more-than if you want to grab all your reddit content in general. Bonus: can grab nearly everything without needing to wait for the GDPR request.