Hi @LesB,
No. Blocs doesn’t offer a way to directly open and work with existing pages or sites, like other apps such as Pinegrow do.
The Blocs Plus version does offer an Extractor, for extracting typography, images and color from a live website for use in re-designing. Though like many Blocs features across recent versions its not outlined in the documentation.
There was this previous thread also.
https://forum.blocsapp.com/t/steps-for-importing-a-website/24089