Objective
Japan’s MyNaPoint App is crap.
https://play.google.com/store/apps/details?id=jp.go.soumu.mkpf.mkpfmypage&hl=ja&gl=US
They are restricting support device way too much.
However if your phone has NFC, you still have a way to install MyNaPoint App.
Procedure
Very easy, get MyNaPoint App’s APK and install it.
I’ve got the APK from below webiste:
If you don’t trust apkpure, find the right APK yourself.
Once you got the APK, install it to your device. There are various articles on how to install via apk when you google it.
With it installed, now you can read My Number Card through the MyNaPoint App and make application to receive MyNumber Point through Rakuten Pay and PayPay.