Connecting to other builder spaces in data tab

We have multiple sites and have a space for each site. We then also have content that can be shared across sites (e.g. blogs) and i want to be able to use the data tab to connect to data in other spaces. I know you can connect to other headless CMS products with plugins but what about other builder spaces?

Please fill out as many of the following questions as possible so we can help you promptly! If you don’t know how to answer or it does not apply, feel free to remove it or leave it blank.

Builder content link
e.g. Builder.io: Visual Development Platform

Builder public api key
go to Builder.io: Visual Development Platform and copy your PUBLIC api key

What are you trying to accomplish
e.g. I want to integrate builder on a landing page

Screenshots or video link
Screenshots of your issue, or even better a link to a video of what is happening or what you are trying to accomplish. We love using loom for that sort of thing

Code stack you are integrating Builder with
e.g. NextJS, react, Shopify

Reproducible code example
If you are having integration errors, please link to codesandbox or copy and paste your problematic code here. The more detail the better!