To access the Google Play Store, synchronization tools, and location services, you must flash a Google Apps (GApps) package. While OpenGApps was historically the go-to option for older Android versions, has emerged as a highly reliable, customizable, and modern alternative for Android 9 (Pie).
This is the standard method for a new ROM installation.
Note: Always flash the ROM first, followed immediately by the GApps package before your first boot. Advanced Customization: The nikgapps.config File