While Windows is no longer the first-class citizen it was in the iOS 8–9 jailbreak era (when Pangu and TaiG dominated), you jailbreak iOS 12.5.7 using Sideloadly + Chimera . The process is straightforward, semi-untethered, and surprisingly stable.
: Restart your PC and enter the BIOS/Boot menu to boot from the USB drive. Connect Device jailbreak ios 1257 windows