What is the main purpose this would serve for you all?
One reason we haven't added this is because the age of a stream is kind of irrelevant to the owners, moderators, and content. It could have been created as a shell stream 10 years ago and then revamped 5 different times with different moderation styles and owners.
Is this just a very short-term thing where you want to know if someone is trying to create a new stream as a fraud copy of an old stream or something?