drag and drop events are not triggered

Question

I am trying to build an application that will read the content of some files provided by the user. I built a window with a label, lineEdit, and q push button for the user to select the file, but I'd want to implement some Drag&Drop

The issue is that I cannot make the drag & drop event behave correctly, I have overridden the dragMoveEvent, dragEnterEvent, dragLeaveEvent, and dropEvent but those functions are not called when dragging/dropping a file or text in the widget

My current implementation (100% of my code) :

from PyQt5 import QtGui, QtCore
from PyQt5.QtWidgets import QWidget, QApplication, QVBoxLayout, QLabel, QTextEdit, QPushButton, QSpacerItem, \
    QSizePolicy, QHBoxLayout, QLineEdit


class FileUploadWidget(QWidget):
    def __init__(self, parent=None):
        super().__init__(parent)
        self.acceptDrops()
        self.init_ui()

    def init_ui(self):
        self.setLayout(QHBoxLayout())
        self.layout().addWidget(QLabel("File Selection", ))
        self.layout().addWidget(QLineEdit())
        self.layout().addWidget(QPushButton("Browse", ))
        self.layout().addItem(QSpacerItem(10, 0, QSizePolicy.Minimum, QSizePolicy.Expanding))
        self.layout().addWidget(QPushButton("Send", ))

    def dragMoveEvent(self, a0: QtGui.QDragMoveEvent) -> None:
        print("Drag move")
        return super().dragMoveEvent(a0)

    def dragEnterEvent(self, a0: QtGui.QDragEnterEvent) -> None:
        print("Drag enter")
        return super().dragEnterEvent(a0)

    def dragLeaveEvent(self, a0: QtGui.QDragLeaveEvent) -> None:
        print("Drag leave")
        return super().dragLeaveEvent(a0)

    def dropEvent(self, a0: QtGui.QDropEvent) -> None:
        print("Drop event")
        return super().dropEvent(a0)

    def mousePressEvent(self, a0: QtGui.QMouseEvent) -> None:
        print("Mouse pressed")
        return super().mousePressEvent(a0)


# class FileUploadWindow(QWidget):
#     def __init__(self, parent=None):
#         super(FileUploadWindow, self).__init__(parent)
#         self.init_ui()
#         self.acceptDrops()
#         self.setMouseTracking(True)
#
#     def init_ui(self):
#         # Create a layout
#         self.setLayout(QVBoxLayout())
#         self.layout().addWidget(FileUploadWidget())


if __name__ == '__main__':
    import sys

    app = QApplication(sys.argv)
    window = FileUploadWidget()
    window.show()
    sys.exit(app.exec_())

Am I missing something ? The mousePressEvent does get triggered when clicking anywhere in the window

I am running Python 3.9.12 (tags/v3.9.12:b28265d, Mar 23 2022, 23:52:46) [MSC v.1929 64 bit (AMD64)] in a venv