The following are 5 key sites related to Power Platform barcode aspects:
Create a Canvas App with the Barcode Scanner Control:
https://docs.microsoft.com/en-us/power-apps/maker/canvas-apps/how-to/create-app-barcode-scanner
Web Barcode Scanner Control (Experimental) in Power Apps:
https://docs.microsoft.com/en-us/power-apps/maker/canvas-apps/controls/control-barcodescanner
Power Apps Pattern: Asset Management:
https://docs.microsoft.com/en-us/power-apps/guidance/patterns/asset-management-pattern
Launch and Param Functions in Power Apps:
https://docs.microsoft.com/en-us/power-apps/maker/canvas-apps/functions/function-param
Scan Barcode from the Power BI Mobile App:
https://docs.microsoft.com/en-us/power-bi/consumer/mobile/mobile-apps-scan-barcode
