Automating gojs canvas(testcafe)

Hey Guys,
We are using go.js for one of our project and we have Test Cafe as our automation testing framework, but somehow we are not able to select gojs elements in the canvas so that we can continue our testing using test cafe.
Can you guys please help around this ?

We are completely unfamiliar with TestCafe.

Have you read Testing GoJS apps -- Northwoods Software ?

This helps. TestCafe is similar to Cypress / Playwright in that it is a JS based UI automation platform.
We can explore the Robot plugin and the Cypress examples.