How to restore a subscription when migrating to a new device?

I again recently subscribed to your app. I had it on my old phone - Sony XA Ultra & am now wanting to use it on a Samsung Galaxy A11...that's why I subscribed & opened a cloud acccount.Pls teach me how to get my PAID version on my Samsung A11.I tried following tutorials on Google but what I am getting is the unsubscribed app.How do I transfer my old notes from Sony Experia XA Ultra to a Samsung Galaxy A11 & use my PAID (Php109) app?