New to Garuda, unable to update or use pacman

From this:

I’m more keen on thinking that your issue is at DNS level.
Could you please provide the output of:

cat /etc/resolv.conf

If it shows an external DNS server, you may want to try changing it using the Garuda Assistant.
If it is your internal gateway or changing the DNS as suggested above does not help, you may want to give a look at this post, which an interesting suggestion on what you can do on your router to set the DNS there and possibly avoid ipv6:

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