WhatsApp data transfer problem

iPhone 6 to iphone 11 whatsapp transfer

I have a iphone 6 and need to transfer my whatsapp data to iphone 11 but I am not able to do so. And I also tried iphone cloning u can say it worked in a manner... Phone did clone the whatsapp but whatsapp not allowing. when I opened the app it's showing me uninstall the app and reinstall. After that when I am trying to do that my old iphone keep getting on Home screen... I am not able to scan QR and not able to use move chats to iphone same issue.....

I tried 3 defferent methods

1. iPhone cloning .( In this all the data is in phone but whatsapp not allowing it)
2. QR code.( Keep getting on home screen)
3. Move chats to iphone.(Same as above)
4. Only need WhatsApp chats nothing else...