Right now, we don't allow for one Card or a Board to live in two Collections at once. If there are Cards with the same information that could belong in multiple Collections, we recommend making a Collection where these Cards can live so that anyone who needs the knowledge can access it, across teams. This knowledge will also show up in a search for any user that has access to the appropriate Collection.
If you have a full Board that you'd like to duplicate into another Collection, it might make sense to make that Board a Collection and consolidate all the knowledge in one place to make it accessible to all users who need it.
Another option is our Board Group Permissions & Board Permissions feature, which allows you to share Board Groups & Boards with teammates who don't have read access to the rest of the Collection.
🏡 Check this out in the Guru Community!
You can share your support for this feature enhancement with our Product team by
upvoting the Guru Community post Add Cards to Multiple Collections.