Hello @SherryELusk
I am not totally sure if you are referring to the student ePortfolios created from within your Canvas account, or the Projects you can create on Portfolium. I will provide you with documentation for both platforms.
If your trying to share an ePortfolio that is private, you can easily generate a link that will give other access to view your ePortfolio without having to log into canvas. HERE is guide on how to do that.
If your ePortfolio is public, it will allow anyone with the URL to view your ePortfolio. HERE is a guide on that and how to adjust those settings.
If you are using Portfolium, You can easily generate a link or embed code to share. HERE is a guide on that process.
Hopefully this helps!
-Colton