I think it's a problem from iPhone to Android. You need to backup WhatsApp and then install it on the new phone and transfer it.
Transferring WhatsApp from iPhone to Android can indeed be tricky. Backing up your data first and then reinstalling on the new phone is a reliable method to ensure a smooth transition.
Iphone'dan Android'e Geçerken Whatsapp Mesajlarını Aktarma
in GSM Bilgi Paylaşımı
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Transferring WhatsApp from iPhone to Android can indeed be tricky. Backing up your data first and then reinstalling on the new phone is a reliable method to ensure a smooth transition.