Hi there,
if you edit your site that was built on Crypto. In Appearance > Elements edit the Archive Template. Select Copy All from the 3 dot menu.
Now in your other site, create a new Block Element, and set it to the Element Type: Content Template.
https://docs.generatepress.com/article/block-element-content-template/
The Display Rules should be set to Blog and Archives > All Archives.
Now in the Block Editor paste in the Copied blocks from your other site.
Final piece is to make sure the Blog Module is enabled in Appearance > GeneratePress. Then enable Columns and set them to 3 in Customizer > Layout > Blog.