I have just pushed WP Discourse version 2.0.2 to the WordPress plugin repo. The update should fix the issue with broken images that’s been happening when posts are published to Discourse with the Block editor.
Images, image galleries, as well as Youtube and Vimeo videos are all now being extracted from posts and formatted in a way that Discourse can handle. Let me know if you run into any issues with the update. If there are still WordPress blocks that are not rendering correctly on Discourse, let me know - blocks can now be parsed by name, so it should be possible to resolve any problems.
Next week I’ll add a filter that can be hooked into to parse any blocks that are too obscure to be dealt with by the plugin.