I have noted that in the first one I am using

$billData = UploadInvoiceBillData::from($request->only(['invoice_number']));

Isntead of

$billData = UploadInvoiceBillData::validateAndCreate($request->only(['invoice_number']));

The second one I am using

$billData = BillData::from($request);

I feel from method only validates first if it is an instance of Illuminate\Http\Request