After the update, the kernel disappeared due to lack of disk space. How to compile or install kernel in chroot. The message that it is impossible to install as root. The upgrade command downloads the files but does not install them.
not fully clear how your kernel disappear …
If you can not boot also from fallback entry… you need to boot into installer ISO (stick) and arch-chroot… what will make it possible to reinstall kernel and may get some space freed if needed…
https://discovery.endeavouros.com/system-rescue/arch-chroot-for-efi-uefi-systems/2021/03/
when chrooted check space in terminal:
duf
free some space by removing packages cache:
paccache -rk2
if not give you space for kernel… uninstall unneeded packages… or move files to archive on external disk could help…
reinstall kernel:
pacman -S linux linux-headers
initramfs-linux-fallback.img - That helped
previously i tried to copy files from iso (/arch/boot/x86_64/). But he was looking for a label
pacman -S linux linux-headers
not installed in chroot
pacman -U /var/cache/pacman/pkg/linux-5.19.4.arch1-1-x86_64.pkg.tar.zst
not installed in chroot