Hello, I did not find a way to add some help for a custom block?
To add a help dialog to a custom block, just go into the block editor, and add a comment to the block prototype (definition).
I tried this, as this is the natural wat, but when I right click on the prototype, I do not see add a comment.
Yeah, I don't know why that's not an option. In order to do it, you need to right click the scripting area (not the block) then click add comment, and drop the comment on the block prototype.