Sorry to hear that, I’ll have to gracefully step aside now I have not dual booted in over a decade now and I have no need or use for Windows. 
20+year Happy Linux user.
also try and check your hardware settings in the BIOS - does it see the windows drive?
then try turning off secure boot.
It does detect windows and secure boot was off long time ago
At this point I’m just gonna install Limine
Please give a feedback if it will work with limine.
Right now I’m having trouble even installing this, and somehow uninstalled all cachyos-v3 databases. But that’s on discord