Booting from Live ISO would allow use of inxi -Fazy to get system information
Information would be better if manjaro-chroot is able to access installed OS
If this is a new install it may be simpler to reinstall OS
Since this is an older system I would suggest you try minimal ISO with v6.1 LTS kernel to reinstall
and update: manjaro-xfce-23.0.2-minimal-230919-linux61.iso from Manjaro-23.0 uranos released