📱iOS 11.1 - 20C69 has been released for 4 devices
ADP3,2, MacBook Air (M1, Late 2020), MacBook Pro (M1, Late 2020) and Mac Mini (M1, Late 2020)

📱iOS 5.1 - 18P3030 has been released for 16 devices
iBridge2,1, iBridge2,10, iBridge2,12, iBridge2,14, iBridge2,15, iBridge2,16, iBridge2,19, iBridge2,20, iBridge2,21, iBridge2,22, iBridge2,3, iBridge2,4, iBridge2,5, iBridge2,6, iBridge2,7 and iBridge2,8

📱iOS 11.1 - 20C69 stopped being signed for 1 device
Mac Mini (M1, Late 2020)

📱iOS 14.2 - 18K60 stopped being signed for 1 device
HomePod mini

📱iOS 9.9.14.3 - 18K6563 [Beta: tvOS143RC] has been released for 3 devices

📱iOS 14.2 - 18B92 stopped being signed for 6 devices
iPad Air 3 (WiFi), iPad Pro 9.7-inch (WiFi), iPad Pro 12.9-inch (WiFi), iPad Pro 2 (12.9-inch, WiFi), iPad Pro 4 (12.9-inch, WiFi) and iPhone SE

📱iOS 12.4.9 - 16H5 stopped being signed for 3 devices
iPad Mini 3 (Cellular), iPad Mini 3 (China) and iPhone 5s (GSM)

📱iOS 14.2.1 - 18B121 stopped being signed for 1 device
iPhone 12 mini

📱iOS 8.4.3 - 12H911 stopped being signed for 2 devices
Apple TV 3 and Apple TV 3 (2013)

📱iOS 8.4.3 - 12H903 stopped being signed for 2 devices
Apple TV 3 and Apple TV 3 (2013)

📱iOS 14.2 - 18K57 stopped being signed for 1 device
Apple TV 4 (2015)

📱iOS 14.2.1 - 18K75 stopped being signed for 1 device
HomePod mini

📱iOS 5.0.1 - 18P2561 stopped being signed for 16 devices
iBridge2,1, iBridge2,10, iBridge2,12, iBridge2,14, iBridge2,15, iBridge2,16, iBridge2,19, iBridge2,20, iBridge2,21, iBridge2,22, iBridge2,3, iBridge2,4, iBridge2,5, iBridge2,6, iBridge2,7 and iBridge2,8

📱iOS 4.6 - 17P6610 stopped being signed for 13 devices
iBridge2,1, iBridge2,10, iBridge2,12, iBridge2,14, iBridge2,15, iBridge2,16, iBridge2,21, iBridge2,22, iBridge2,3, iBridge2,5, iBridge2,6, iBridge2,7 and iBridge2,8

📱iOS 14.2 - 18B92 stopped being signed for 45 devices
iPad Mini 5 (WiFi), iPad Mini 5 (Cellular), iPad Air 3 (Cellular), iPad 8 (WiFi), iPad 8 (Cellular), iPad Mini 4 (WiFi), iPad Mini 4 (Cellular), iPad Air 2 (WiFi), iPad Air 2 (Cellular), iPad 5 (WiFi), iPad 5 (Cellular), iPad Pro 9.7-inch (Cellular), iPad 7 (Cellular), iPad Pro (10.5-inch, WiFi), iPad Pro (10.5-inch, Cellular), iPad 6 (WiFi), iPad Pro 3 (11-inch, WiFi), iPad Pro 4 (11-inch, Cellular), iPad Pro 4 (12.9-inch, Cellular), iPad Pro 3 (11-inch, WiFi, 1TB Model), iPad Pro 3 (11-inch, Cellular), iPad Pro 3 (11-inch, Cellular, 1TB Model), iPad Pro 3 (12.9-inch, WiFi), iPad Pro 3 (12.9-inch, Cellular), iPad Pro 3 (12.9-inch, Cellular, 1TB Model), iPad Pro 4 (11-inch, WiFi), iPhone 8 (Global), iPhone 8 Plus (Global), iPhone X (Global), iPhone 8 Plus (GSM), iPhone X (GSM), iPhone XS, iPhone XS Max (China), iPhone XS Max, iPhone XR, iPhone 11 Pro Max, iPhone SE (2020), iPhone 12 mini, iPhone 12 Pro Max, iPhone 6s, iPhone 6s+, iPhone 7 (Global), iPhone 7 Plus (Global), iPhone 7 (GSM) and iPhone 7 Plus (GSM)

📱iOS 12.4.9 - 16H5 stopped being signed for 8 devices
iPad Air (WiFi), iPad Air (Cellular), iPad Mini 2 (WiFi), iPad Mini 2 (Cellular), iPad Mini 2 (China), iPhone 5s (Global), iPhone 6 and iPod touch 6

📱iOS 14.2 - 18B111 stopped being signed for 4 devices
iPhone 12 mini, iPhone 12, iPhone 12 Pro and iPhone 12 Pro Max

📱iOS 14.2.1 - 18B121 stopped being signed for 3 devices
iPhone 12, iPhone 12 Pro and iPhone 12 Pro Max

📱iOS 14.2 - 18B92 stopped being signed for 13 devices
iPad Air 4 (WiFi), iPad Air 4 (Cellular), iPad Pro 12.9-inch (Cellular), iPad 7 (WiFi), iPad Pro 2 (12.9-inch, Cellular), iPad 6 (Cellular), iPad Pro 3 (12.9-inch, WiFi, 1TB Model), iPhone 8 (GSM), iPhone 11, iPhone 11 Pro, iPhone 12, iPhone 12 Pro and iPod touch 7

📱iOS 12.4.9 - 16H5 stopped being signed for 2 devices
iPad Mini 3 (WiFi) and iPhone 6+