Bootloader does not show Arch (Dualboot)

This could be the reason for your problem, although at a quick internet search this could be really only a “warning” not affecting the functionality.
Give a look at this one in our forum and see if anything changes:

Also, update your system fully (I see an old kernel, so probably this is a new install) with a:

garuda-update

Finally, on the Arch side, you could give a look at this:
https://wiki.archlinux.org/title/GRUB#Arch_not_found_from_other_OS

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