Is the RSC Border Still Existing?

Northern Ireland is Northern Ireland now. Has it regained some of the sovereignty? They said it had lost. Is that RSC border? Does it still exist? Or does it not? And is Northern Ireland as British as it was or wasn't before the framework document was published? The answers to that are myriad, and I guess people are still trying to work in it. John Major: "I think what we have got is certainly movement from what Boris Johnson originally landed us with"