Unable to boot back into macOS after using boot camp Windows 10 nor perform Recovery

Q: How can I reset my MacBook Pro 2018 back to factory settings while I'm unable to enter the recovery process?

Steps

• I was happily running macOS (Monterey from memory)
• I used the Boot Camp Installer to install Windows 10
• I was using Windows 10 only for a few weeks
• Now I want to sell my MacBook so I decided to try and reset it
• Pressing Command-R > It doesn't prompt anything, the system run enters a restart loop
• Option-Command-R, Option-Shift-Command-R during boot lets me enter the process
• However I always get a "-1008F" or "-2100F".
• I've removed the device from my iCloud
• I've reset the NVRAM
• I've tried using an ethernet cable instead of Wi-Fi
• I've tried booting from a Monterey Bootable USB drive > I can press 'Option' to select it as a boot option but the system just restarts into a restart loop
• Selecting 'Option' to boot into Macintosh HD also just enters a restart loop (Apple logo then blank then turns off - repeat)
• Selecting 'Option' to boot into Window 10 still works fine.

I'd like to hear a solution so I can just reset this back to macOS only. Perhaps via some Windows tool to fix the MBR?