Cypress iFrame configuration

[Laul0]

Hi Cypress Community,

I have a use case that requires adding an attribute to the Cypress iframe.auth-iframe:

I tried to force the attribute from the test file:

describe('', () => {
  before(() => {
    cy.parent()['specWindow']['Cypress']['$autIframe'][0].MyAttribute = 'value';
  });
});

This is ugly but my attribute is well assigned but the test is stuck at this line of code.

The question is: Is there any way to add attributes to this iFrame? From the config or something else?

Thank you 🙏🏻