The plural accusative form of "يد" (yad) is indeed "أيدي" (aydi), but in some dialects of Arabic, it is common to add the suffix "-ا" (pronounced "-a") to the end of the word for emphasis or to add a poetic or literary effect. So, "أيديا" (aydiya) could be an alternate form of the word used in some dialects or contexts. However, it is worth noting that the use of this form may vary depending on the specific dialect or context in which it is used.

It is correct to say أَيْدِيًا if it isn't defined with ال or a genitive case إن أيدِيًا غريبةً قد امْتَدَّت إلى النقودِ كَبِّلوا أيْدِيَهم! أنتُم لا تُقدِّرون الأيديَ العاملةَ! يبقى تنوين الفتح في حالة النصب Hope this helps