It would be some what embarrassing for the FAA should they not.
JATR regulators may be a little flexible for re-certification, one country my go above and beyond to do evaluation tests - Tick Tock.
That could then expose the other regulators cozy relationships or interpretations of regulations for a back scratch later.
High stakes on this - and we see very little to no transparency to date on "the fix" from Boeing or the FAA.