HOW TO GET THE WINDOW MAXIMIZED/ZOOMED (CustomTkinter, CTk):

[Wasi-Genius]

So I was trying to find a solution on how to get a Custom Tkinter window maximized and I finally found a solution on overflow:

Also, here is my working code for reference:

from customtkinter import *
from tkinter import filedialog as fd
from PIL import Image

set_default_color_theme('dark-blue')

root = CTk()
root.title('Image Viewer')
root.iconbitmap(
    'C:\PythonProjectsWasiG\GUI Python\ImageViewerEditor\ImageViewerIcon.ico')
root.after(1, root.wm_state, 'zoomed')

[Maimx]

Or you can also use an additional library.
(It took me a while to find this library)

Install the library:
pip install pygetwindow

Code:

import pygetwindow as gw

root = tk.Tk()

def maximize_window():
       window = gw.getActiveWindow()
       window.maximize()

root.after(1000, maximize_window)
root.mainloop()

[therealzakie]

This isn't very multi-platform friendly though :(