Models that support Portrait mode in FaceTime
iPad mini (5th generation and later)
iPad (8th generation and later)
iPad Air (3rd generation and later)
iPad Air 11-inch (M2)
iPad Air 13-inch (M2)
iPad Pro 11-inch (all generations)
iPad Pro 11-inch (M4)
iPad Pro 12.9-inch (3rd generation and later)
iPad Pro 13-inch (M4)