When Adding a “grid widget” to a page from the BM content builder and setting the source as “media library”, you cannot add “SVG” images even though the included “SVG support” plugin is activated and a number of SVG images exist within the media library. In fact, when the media library modal pops up all SVG images are actually missing from the interface as if they were filtered out. However, SVG seems to do work in other areas of the site such as the BM text widget, just not in the “grid widget”.
See video for example. What you can’t see in the video is about 20 SVG images that exist and are viewable when accessing the “media library” separately from with the WordPress admin dashboard.