from tkinter import Tk, Label, Entry, Event


root = Tk()
root.wm_geometry("600x600")
root.title("Перше вікно")
root.config(background="yellow")


entry = Entry(root, width=30, font="Сalibri 13")
label = Label(root, foreground="darkblue", font="Сalibri 13")


def change_label_text(_: Event) -> None:
    label.config(text=entry.get())

root.bind("<Button-3>", change_label_text)


entry.pack()
label.pack()
root.mainloop()