Arabic is on the Semitic branch of the hypothesised proto-Indo-European language, which has dual number: https://en.wikipedia.org/wiki/Dual_(grammatical_number)

So you'd expect to see languages from western Europe to south Asia that either have the dual concept, or have an attested ancestor that did.

The Semitic language family is not part of the proto-indo-european language family. It's from the Afroasiatic family

https://en.wikipedia.org/wiki/Semitic_languages

https://en.wikipedia.org/wiki/Afroasiatic_languages

Within Indo-European languages, Irish has the concept of the dual. It's used with things that come in pairs like "mo dhá láimh" - my two hands.

Interestingly, to say one-handed you'd say "leath-lámh", where _leath_ means half, so half the <thing that's usually one of a pair>.

Semitic languages are Afroasiatic, not Indoeuropean.