Yes, TV shows are currently suspended. The Conners had finished shooting its 2019/2020 season. Normally, they would all be expected back for next season by late July or early August, which explains Laurie’s spring Broadway openings the past few seasons, but no one knows when any production will be back to normal at this time.
I heard she was outstanding as Martha and truly regret not seeing her. I was already nervous about sitting in a crowded theatre by the time their previews began.