Did you turn off (((secure boot)))?
No, but I did try that this time.
https://www.pasteboard.co/Tc5oQvkfKVPy.jpg
Now my computer basically tells me to fuck off.
This means that windows is booting, it just couldn't decrypt your C: Volume.
If you wanted to boot a bootloader like grub, you simply lost the interrupt race. Firmwares usually let you choose what you want to boot, amd can sometimes be found on the exit menu. Otherwise, disable fast boot and then press what ever the magic button is to 'boot from a device', like del, F8, etc.
@AOU I think I found a bug.
Edit: I would show you a screenshot, but image sharing isn't as straightforward these days.
If it's related to Poal, you can report it in /s/Poaldev