There are two methods to share a customized tool/thread.
To share, click the Share button on the left-hand side of the tool. Then, select either Share Publicly or Share With Org Only, check the Give Consent box, and click Copy Link. You can then share that link with others.
Go to your Output History and click the lock icon under the Share column to update the sharing settings. Once you click the lock icon, select either Share Publicly or Share With Org Only, check the Give Consent box, and then click Copy Link. You can then share that link with others.