Hi! Sorry you’re running into this. From what you described, the priority is to get Windows booting normally again, then address the Wi-Fi issue. First boot into the Windows Recovery Environment (WinRE) and run Startup Repair, from the recovery screen select Troubleshoot > Advanced options > Startup Repair, then restart and test as mentioned here:
https://support.microsoft.com/en-us/windows/startup-repair-85deb0b9-fa3d-44a3-a3d0-d0f1515c2c9b.
If you can’t reliably reach WinRE, use a Windows USB installer and choose Repair your computer (instead of Install) to access the same options; to create the USB, follow Microsoft’s guide here:
If Startup Repair can’t fix the boot files, Microsoft documents using BCDBoot to repair boot configuration (advanced option):