Lost windows bootmgr

I have recently encountered some issues with EndeavourOS not wanting to boot and that it’s unable to mount the /boot/efi partition, solved that using a live Arch Linux installation media by formatting the boot partition and installing the kernels and configuring GRUB everything went fine and my system is now up and running but just yesterday I discovered that I can’t boot into windows 11, and it displays the following:

error: no such device: 8E15-F394.
error: file '/EFI/Microsoft/Boot/bootmgfw.efi' not found.

Press any key to continue....

Any help would be much appreciated, Thanks in advance wonderful community!

@PurplePunguin
I can’t say for certain but try this:
1.

sudo blkid -s UUID

shows the new UUID of your newly created Efi partition

8E15-F394 should replaced by that in /etc/fstab
2.
su

cd /boot/efi/EFI
mkdir -R Microsoft/Boot

with thunar or other file manger mount by double clicking the Windows partion
mark down the path (/dev/nvme0n1p5 with me)
df -h shows # with me
/dev/nvme0n1p5 145G -48G 192G - /media/a/C6D69350D6933F9B
cp -R /media/a/C6D69350D6933F9B/Windows/Boot/EFI/* /boot/efi/EFI/Microsoft/Boot/
then after reboot
sudo grub-mkconfig -o /boot/grub/grub.cfg #or grub2

Otherwise if you use Window boot recovery it wiil spoil EnOS boot I guess.
https://github.com/H4medRostami/Windows-EFI_Partition-recover

Thanks for your help, and sorry for the late reply,
I won’t spend much time on this, so I just deleted the Windows 11 partition I’ll set it up again when I’m free, I wasn’t using it much so it’s not something urgent, again Thanks for your time.

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