Hi, I too have just purchased an iPhone 13 pro max after coming from Android since iPhone 3GS....
So pretty much in same boat as you.
Most things Google related transfered and set up as expected. Photos I did on my laptop using iTunes as already mentioned.
As for my whatsapp messages I used software called mobitix.
Move your WhatsApp history from Android to iPhone. This page will assist you with some common solutions when you have any difficulty handling your WhatsApp data between two operating systems. Click here to know more.
www.mobitrix.com
Followed the onscreen instructions and had all my android messages, including and groups or broadcast list, copied across in about 15 mains....