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Pacman force ipv6?

There are answers for disabling ipv6 is it possible to force ipv6 instead?

already using https://archlinux.org/mirrorlist/ to select ipv6-capable mirrors

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Have you set your system to prefer it in gai.conf?

You said enforce in the post, but prefer in a comment. Do you mean prefer ipv6, or disable ipv4?

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Maybe if you found some way to run it in a namespace with no ipv4 network.

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that would work, yes, thank you

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You could use a dns server that does not offer any A records.

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just block ipv6 at router-level