Phone damaged in water 10 days ago but last back-up was made on computer 1 month ago. What shall I do to keep all the data when I get a new phone now?

I dropped my iphone x in the sea 10 days ago and since then been using an Android phone my friend loaned me. My last backup on that iphone was made a month ago on my Macbook. I have been using Whatsapp, Wechat, emails and other Apps on that loaned Android phone. When I get a new iphone, what should I do so that I could also transfer all the data generated during this time on that Android phone onto the new iphone? Thanks!!