Real frontend preview of dynamic fields in gutenberg block

[wpsumo]

Describe the feature you'd like to see included in Oxygen.
I would prefer to see the real connected data to the dynamic fields in gutenberg blocks and not a preview of lines. Fetch the data into the preview on save post. But make sure it doesn't impact performance and take long time to save etc.

Once it's saved the data and preview is stored and user/client can see what the block actually show. The css for the block is anyhow loaded.

What are the use cases for this feature?
Improved usage of the feature, gutenberg is designed to show how it will look on the frontend, this is preventing that feature.

Examples of this feature or functionality.
Native gutenberg blocks