DO NOT INSTALL Android Pie (47.2.A.6.30) - it breaks NFC
Android Pie (47.2.A.6.30) rendered my device's NFC useless. The support asked me to repair (perform clean reinstall via Sony Companion app's "repair" feature). I've done it, no change. NFC is still not working. Google Pay and all other NFC apps (Android Beam, any other apps reading NFC tags) stopped working.
The support couldn't give any useful help and finally asked me to send back my phone for a repair.
NFC was working absolutely fine before the Android Pie update, so it's not a hardware issue.
I suggest keeping the Android 8 as is on XZ1C (unless you're happy to use the phone without NFC).