using sudo -su

mkdir /mnt/chroot

cryptsetup open /dev/mapper/lvm-lvroot root

mount /dev/mapper/root /mnt/chroot
mount /dev/nvme0n1p1 /mnt/chrtoot/boot

mount --bind /dev/ /mnt/chroot/dev
mount -t proc /proc /mnt/chroot/proc
mount -t sysfs /sys /mnt/chroot/sys

chroot /mnt/chroot

arch boot issue