Thanks for your interest, @Philip_Hurst, and welcome! 
We absolutely love this idea and really have plans to consider a share access to particular widgets option in our future releases. I’m afraid, we don’t have any info about the ETA just yet, but we keep tabs on this request here on Wishlist to understand how important it is for you.
By the way, we’ve just released a feature to invite members to your Elfsight account, which was our first step in this direction. If you’re interested, this post has more details about this release: [MAJOR UPDATE]: Introducing the INVITE MEMBERS feature in your Dashboard! ⚡.