For Android 7.0/7.1 Nougat-based custom ROMs on any Android device, you will need to grab Android 7.0/7.1 Nougat Gapps to get Play Store on your phone.
Without Nougat Gapps, you will end up without essentials of Google services and Google apps. Of course, you can always go without it if you plan on sideloading all of your apps but for those who use Play Store to download new apps, having Android 7.0 Nougat Gapps is a must.
There are two types of Android 7.0/7.1 Gapps you can use here.
For Android 7.1 Nougat:
For Android 7.0 Nougat:
Credits – Banks