Switching from android to ios - painful data transfer.

Bought my wife an iPhone and it's taking a really really long time to transfer the WhatsApp files specifically.

It says 1 minute remaining but not true of course.

Right now I'm on 32k/68k WhatsApp items. It's on 92.83%. it was on 92.77% 40 mins ago.

Is there a way to switch this to transfer via wifi? The iPhone is charging the android. I luckily had a wireless charger available so can charge the iPhone.

Or can I stop it and transfer at another time? Is the WhatsApp going to be unusable on android? When I go to the app it shows move chats to ios almost done.