How comment and suggestion works in custom and reusable blocks works?
You must click Publish or Save Draft on the page or post for any Multicollab activity to save on your website database. There is currently no autosave feature for Multicollab.
Commenting: You can comment on text and media in reusable and custom blocks. Commenting on a dynamic block’s content is not supported, but you can comment on the entire block.
Suggestion: Yes, add suggestions in custom, dynamic, and reusable blocks. It is compatible with Gutenberg blocks. Learn more.