Some users have successfully used tools like sunst0rm to downgrade from 15.7.3 to older versions like 12.4.1, though success rates vary.
Risks and trade-offs (concise)
Semi-tethered, meaning you must reconnect the device to a computer to re-enable the jailbreak if it reboots. Compatibility: iphone 7 ios 15.7.3 jailbreak
The tool will automatically inject the exploit code. Your device will display a text-based booting screen. Some users have successfully used tools like sunst0rm