Can a shared showModalBottomSheet function serve several different pages in a flutter app?

A shared showModalBottomSheet requires you to supply the current context, for example

void openSharedSheet(BuildContext pageContext) {
    showModalBottomSheet(
        context: pageContext,
        builder: (sheetContext) {
            return Text("Shared bottomSheet");
        },
    );
}

Further showModalBottomSheet details (https://api.flutter.dev/flutter/material/showModalBottomSheet.html)

Yes. Define a shared showModalBottomSheet function, with a child parameter carrying the view you want

///
/// Open the shared modal sheet
///
Future<R?> openSharedModal<R>({
    required BuildContext pageContext,
    required Widget content,
    bool? scrollControlled,
    ShapeBorder? borderShape,
    bool dismissible = true,
}) {
    return showModalBottomSheet<R>(
        isDismissible: dismissible,
        context: pageContext,
        elevation: SheetSettings.elevation,
        barrierColor: SheetPalette.barrier,
        isScrollControlled: scrollControlled ?? true,
        enableDrag: true,
        backgroundColor: SheetPalette.modal.ofContext(_pageContext),
        shape: borderShape ?? SheetSettings.borderShape,
        builder: (BuildContext sheetContext) {
            return content;
        },
    );
}