I managed to jailbreak and install palera1n on iphone 7 ios 15.7 via usb key I installed in rootless, I'm on windows. error messages to redo the jailbreak, (see comment section) :
Help]iphone 8 plus on 16.4.1 jailbreak not working with palera1n windows : r/jailbreak
Jailbreak no iOS 7: aprenda a desbloquear seu iPhone, iPad ou iPod Touch
Help] Palera1n jailbreak iPhone 7 Plus iOS 15.1 keep failing no matter what i do. Some advice is helpful : r/jailbreak
Jailbreak iPhone 6s, 6s Plus - iPhone 7, 7 Plus | iOS 15.7.7 On Windows with Palen1x - YouTube
Windows] How to Jailbreak iPhone 7 /7 Plus iOS 15
Jailbreak checkra1n ganha suporte inicial ao M1 e ao iOS 14.5 - MacMagazine
How to Jailbreak iPhone 8, 8Plus, iPhone X - iOS 15.0 16.4.1 On Windows with Palen1x - ICTfix
Jailbreak iPhone 6s, 6s Plus - iPhone 7, 7 Plus iOS 15.7.8 On Windows with Palen1x - YouTube