Cross Docs Widgets & Views

Hello Grist Team!
As the number of documents grows, the issue of synchronizing and viewing data from different documents in one window becomes more pressing.
While there are not many documents, n8n integration copes with this quite well, but with the increase in synchronization, the support of this zoo exceeds all reasonable limits.

Is it possible to somehow display tables from one parent document as a data view (like SUM tabes) in a child document, with the ability to display a widget of this view and select the parent table view as the data source in the Reference column of the child document table?

Just wanted to say I’m curious about this too. Can grist add data via its own API?