You can check the user guide of AceThinker WhatsApp Transfer for iOS here: https://www.acethinker.com/iphone-data-recovery/howto-use-fone-keeper.html
The supported iPhone models for WhatsApp Transfer range from iPhone 3GS, the earliest supported model, to the iPhone 12 Pro Max. The software also supports iOS devices that run iOS 15 and earlier.
After running the software, you can connect your iOS device to your computer and run a scan for the WhatsApp Messages. Before you backup or transfer the scanned messages, the software will allow you to preview the conversations that you have on WhatsApp.
Yes, transferring WhatsApp messages to another iPhone is possible. You can use AceThinker Fone Keeper’s WhatsApp Transfer for iOS to do the process. You have to connect your iPhones to your computer via USB cable to follow the application instructions for the transfer.