On the 8 December 2021, Halafihi was selected by Alessandro Troncon to be part of an Emerging Italy 27-man squad for the 2021 end-of-year rugby union internationals.

In February 2022, he was selected for Italy for the first time by coach Kieran Crowley for the 2022 Six Nations Championship, despite never having been capped for the senior squad. He made his debut against France.

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