If the shadows of Material Blurb for Divi are being clipped at either side or the bottom of the blurb, you should check if the Row which contains the blurbs has the overflow: hidden; property set.

To fix it, simply add overflow: visible !important; to the rows Main Element in the Advanced settings of that row.

Another solution is to set a custom margin on the blurbs or to set a custom padding on the columns of the row.