I am unable to have line breaks show up within the grid. they do show up on the original pages and my HTML is not disappearing, thy just aren't working within the grid.
Welcome to our forum.
you might be using the excerpt on layout editor, that doesn’t display any HTML tags, you could try following plugin to keep html/styling excerpt https://wordpress.org/plugins/advanced-excerpt/
otherwise, there is a filter hook for excerpt you can display your own excerpt as you want.
Please see the documentation.