Personally I wouldn't follow up post-WG. Grad Rec will be exceptionally busy at the moment, especially if they're WFH, and they'll receive dozens of emails asking similar questions. I know the wait is exceedingly hard but just try and concentrate/ distract yourself with other stuff to try and make it easier! Also don't assume a rejection is imminent, it might be the case that they're just weighing up different apps against each other to decide on exactly who to ask to interview so it doesn't necessarily mean you'll be knocked back!
Very best of luck