pandemic shutdown has enabled “Supernanny” star Jo Frost to shift into high gear — off-camera — to help parents cope with the virus and its impact on their family dynamics.Frost, 49, was in the midst of shooting her series, which moved to Lifetime in January after a six-year run on ABC (2005-2011), when production stopped in mid-March.That’s when her popular social media accounts “went off the charts” with parents seeking parenting advice, she says.“That first stage was pandemonium and everybody panicked, which is typical for all of us,” Frost tells The Post. “Parents were having what I’d call ‘pandemic challenges’ along the lines of home-schooling and creating healthy boundaries for [their families] and not being on top of each other and.