This depends what you mean by 'issues with NFC'. My understanding is that Google require an OS that is blessed by them for contactless payments in Google Wallet to work. That restriction applies to all alternative operating systems that aren't Google certified stock Android.

The OEM partnership would not change that.

In non-NA regions there may be more options for mobile contactless payments using apps that are not Google Wallet/Pay. So it also depends where in the world you are.