Xamarin.Forms .NET Standard 2 Support

I am looking to implement barcode scanning in my POS Xamarin.Forms (.NETStandard 2) application supporting IOS, Android and UWP.  I am focusing on IOS but the goal is to support all 3 platforms.

We will need same support for printers but focus now is on handheld barcode scanners, not mobile computers. 

Xamarin.Forms

.NET Standard 2.0

IOS

Android

UWP

I am looking for resource to show me how to implement this.  Does Zebra offer something like this?  Honeywell? Anyone?