Hooks/Other way available in Exhibit Builder to add options to the native blocks?

I’m a developer working with Exhibit Builder in Omeka Classic and the existing blocks (text-file,carousel, text, etc). I’m comfortable customizing the public layout views from our theme, but I’m wondering if there is a way to add to the options that are saved with each block? I don’t want to make any changes to the Exhibit Builder plugin code. It seems like there would be hook/s or filters for doing this, but I haven’t found them yet.