This has nothing to do with Beaver Builder. Theme theme does not remove sharing buttons even if you are using Beaver Builder on the post/page.
Have you properly set up your Jetpack Sharing icons? https://jetpack.com/support/sharing/ Once you properly set the buttons you want to display and the post type where they display in Settings → Sharing, it should work.
If it still doesn’t work, please provide admin access to your website so I can check personally.