Archive WhatsApp on preferably Nokia 8110 4G


I will be using the Nokia 8110 4G in the near future. So far I have been using a Motorola Moto G7 Plus. My questions are about WhatsApp.

I understand that the beta version of this application now makes it possible to use the app on multiple phones; is there any way to sync this between Android and KaiOS?

If not, for practical and emotional reasons I'd like to archive the WhatsApp conversations from my old phone.

Is there a way I can continue to view old chats on my old phone while linking new incoming messages to the Nokia?

And if all of the above is not possible, can I make all my app messages, including media, into a document that I can view & search on my PC, for instance?

I'd like to hear that.