CoS is "just" a game module, and doesn't have an separate compendium, as per it's marketplace description: <a href="https://marketplace.roll20.net/browse/module/64/curse-of-strahd" rel="nofollow">https://marketplace.roll20.net/browse/module/64/curse-of-strahd</a> Same with ToA: <a href="https://marketplace.roll20.net/browse/module/65/tomb-of-annihilation" rel="nofollow">https://marketplace.roll20.net/browse/module/65/tomb-of-annihilation</a> You can only view their content if you create a game with them. Only some never Roll20 modules have integrated compendiums for their modules, and it was not an existing feature when these older ones where created.