I am getting this error with pacman
# pacman -Qs pacman
local/pacman 7.0.0.r3.g7736133-1
# pacman -Syyu
:: Synchronizing package databases...
core 228.8 KiB 50.1 KiB/s 00:05 [######################] 100%
extra 9.2 MiB 930 KiB/s 00:10 [######################] 100%
alarm 56.5 KiB 60.1 KiB/s 00:01 [######################] 100%
aur 10.2 KiB 21.9 KiB/s 00:00 [######################] 100%
error: restricting filesystem access failed because landlock is not supported by the kernel!
:: Starting full system upgrade...
Pi4 and pi5 aarch64