A question about the package's native module name

[eeslamadelll]

What react-native version are you using?
0.72.6
What react-native-pdf version are you using?
6.7.5
What platform does your issue occur on? (android/ios/both)
Android
Describe your issue as precisely as possible :
just checking the existence of the package native module using it's name always returns null however it is installed correctly

Show us the code you are using?
using NativeModules['RNPDFPdfView'] always return null, not sure if i'm doing something wrong.
also tried NativeModules[PdfManager] and it returns null as well