On an iPhone, the orange hand icon in the call log typically indicates that the call was a FaceTime audio call. FaceTime allows users to make voice calls over the internet, similar to a regular phone call but using Wi-Fi or cellular data instead of a traditional phone network.
If you see the orange hand icon next to a contact’s name or number in your recent calls list, it signifies that you initiated or received a FaceTime audio call with that person. This is different from a regular phone call (which would not have an icon) or a FaceTime video call (which is represented by a different icon, typically a video camera).
If you have any further questions about your iPhone or its features, feel free to ask!