Precondition: There are two iframes here, one iframe is inside of the other iframe. I have try the following code, by using the iframe plugin.
cy.frameLoaded('iframe[name="FRAMEcontext"')
cy.iframe().find('element A').click()
cy.frameLoaded('iframe[name="TabFrame1"')
cy.iframe().find('element B').click()
it is able to find the element A, however, unable to find the element B. Could you pls share a workaround here? Thanks!