To find the Grid and Masonry Grid module, Please go to “Pages > Add New”, click “BM Content Builder”
You could create portfolio list, blog, WooCommerce products list, or gallery by Grid or Masonry Grid modules.
To create a standard grid list, please use the Grid module like:
Check the video about creating Portfolio page by the Grid module:
There is a drag&drop grid editor within the Masonry Grid module, it will create more flexible grid layout like:
You need to choose the Source for Grid/Masonry Grid. Check how to choose the source.