problem adding and moving QGraphicsScene elements

Question

I am building an application for my end-of-study project, in this application the first window contains keywords, the second contains file names, the third is a graphical workspace and the last is a console.

The problem I have is that I can't do a drag and drop to override the elements of the first two windows in the graphic space, so I tried by double clicking; while I found a solution the elements appear in space but I cannot move or select them.

So, my question is: how to deal with QGraphicsScene?

This is the main class:

import sys
import json
from PyQt5.QtWidgets import QApplication, QMainWindow, QGraphicsView, QVBoxLayout, QSplitter, QWidget, QListWidget, QTextEdit, QLabel
from PyQt5.QtCore import Qt, QRectF
from PyQt5.QtWidgets import *
from CustomWidget import CustomWidget 

class Main(QMainWindow):
    def __init__(self):
        super().__init__()

        self.setWindowTitle("Application PyQt5")
        self.setGeometry(100, 100, 800, 600)


        self.current_x = 0
        self.current_y = 0

        self.keywords = []  
        self.scripts = []   

        self.view1 = QGraphicsView()
        self.scene1 = QGraphicsScene()
        self.view1.setScene(self.scene1)

        self.keywordList = QListWidget()
        self.fileListe = QListWidget()
        self.console = QTextEdit()

        top_layout = QSplitter(Qt.Horizontal)
        top_layout.addWidget(self.keywordList)
        top_layout.addWidget(self.view1)


        bottom_layout = QSplitter(Qt.Horizontal)
        bottom_layout.addWidget(self.fileListe)
        bottom_layout.addWidget(self.console)

        layout = QVBoxLayout()
        layout.addWidget(top_layout, stretch=3)
        layout.addWidget(bottom_layout, stretch=1)

        self.keywordList.setDragEnabled(True)
        self.fileListe.setDragEnabled(True)
        self.view1.setSceneRect(QRectF(0, 0, self.view1.width(), self.view1.height()))
        self.view1.setAcceptDrops(True)

        self.custom_widget = CustomWidget(self.view1)
        
        central_widget = CustomWidget(self.view1)
        central_widget.setLayout(layout)
        central_widget.view1 = self.view1  
        self.setCentralWidget(central_widget)
        self.load_data()

        self.keywordList.itemDoubleClicked.connect(self.add_label_to_scene)
        self.fileListe.itemDoubleClicked.connect(self.add_label_to_scene)

    def load_data(self):
        self.keywordList.clear()
        self.fileListe.clear()
        with open('keywords.json', 'r') as f:
            data = json.load(f)
            self.keywords = data['keywords']
            self.scripts = data['script']
        for keyword_data in self.keywords:
            keyword = keyword_data['keyword']
            self.keywordList.addItem(keyword)
        for script_data in self.scripts:
            file_name = script_data['file_name']
            self.fileListe.addItem(file_name)

    def add_label_to_scene(self, item):
        text = item.text()
        label = QLabel(text)
        label.setStyleSheet("border: 1px solid black; padding: 10px;")
        proxy = self.view1.scene().addWidget(label)
        self.custom_widget.enable_draggable(proxy)
        proxy.setPos(self.current_x, self.current_y)
        self.current_x += 50
        self.current_y += 50

if __name__ == "__main__":
    app = QApplication(sys.argv)
    window = Main()
    window.show()
    sys.exit(app.exec_())

And this is the CustomWidget class:

from PyQt5.QtCore import * 
from PyQt5.QtGui import * 
from PyQt5.QtWidgets import *


class CustomWidget(QWidget):
    def __init__(self, view1): 
        super().__init__()
        self.view1 = view1  
        self.painter = QPainter(self)
        self.painter.drawRect(self.rect())
    

    def enable_draggable(self, item):
        item.setFlag(QGraphicsItem.ItemIsMovable, True)

    def mousePressEvent(self, event):
        print("Left mouse button pressed.")
        self.checkItemsUnderMouse(event.pos())
        event.accept()

    def checkItemsUnderMouse(self, pos):
        print("Element clicked:")
        for item in self.view1.scene().items():
            if isinstance(item, QGraphicsProxyWidget):
                widget = item.widget()
                if isinstance(widget, QLabel):
                    print("Text:", widget.text())
                    print("Position:", item.pos())

    def dragMoveEvent(self, event):
        event.setAccepted(True)

    def dragLeaveEvent(self, event):
        self.update()

I tried to change all the windows to QGraphicsScene but it didn't work.