Ref: How To Dual Boot Arch Linux and Windows 11 - YouTube

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sudo fdisk -l

gets partition detail There should be a partition called “EFI System”.

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blkid

lists every partitions’ UUID. Note the EFI System one.

Reboot into EFI shell. Identify the EFI system partition and note its “Alias” field.

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sudo pacman -S edk2-shell
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cp /usr/share/edk2-shell/x64/Shell.efi /boot/efishellx64.efi

/boot/loader/entries/efishellx64.conf

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title  UEFI Shell x64
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efi  /efishellx64.efi