How can I either ignore blank pages in a pdf using python or add blank pages to a location without changing the total amnt of pages until doc saved?

Question

So I'm using the tkinter and pymupdf libraries to add blank pages to a desired location. This is done by pressing a button which inserts the blank page below the page on the button. My issue is that once it inserts the blank page, the original page order now changes.

When you press a button corresponding to a page number, it inserts the blank page, but if you try with a second blank page, it inserts it at the wrong place because it messes up the button's assigned page number. Please help I'm losing my hair.

import tkinter as tk
from tkinter import *
from tkinter import ttk
from tkinter import filedialog
from tkinter.filedialog import asksaveasfilename
import fitz

btnClick = 0


def launchInsert():
        global root
        global buttonframe
        root = tk.Tk()
        root.title("Bla bla bla")
        root.geometry("800x600")

        #Displays "text" name as title of program
        label = tk.Label(root, text ="Insert Blank Page", font=('Arial',18))
        label.pack(padx=20, pady=20)

        #File Explorer Button
        buttonframe = tk.Frame(root, padx=100, pady=25)
        btn1 = tk.Button(buttonframe,text="Browse...", font=('Arial',18), command=browse_file)
        btn1.grid(row=1, column=6, padx=225, sticky=tk.W+tk.E)
        buttonframe.pack(side="bottom")

def save_file():
    
    f = asksaveasfilename(initialfile = 'untitled.pdf',
    defaultextension=".pdf",filetype=[("All Files","*.*"),("PDF    Files","*.pdf")])
    pdf2.save(f)
    
    

    # with open(file, "wb") as pdfCombined:
    #     newPdf.write(pdfCombined)

def blank(i):
    
    #program is recognizing blank page as document original page then counting it as pagenumber
        #try to just ignore blank pages
    pdf2.new_page(pno=i, width=595, height=842)
    
    
    global btnClick
    btnClick = btnClick + 1
    if btnClick == 1:
        pdf2.new_page(pno=i, width=595, height=842)

    elif btnClick > 1:
        print("This is button click: ", btnClick)
        i = i + 1
        pdf2.new_page(pno=i, width=595, height=842)
    for slices in range(len(pdf2)):
        print("This is new page - ", slices)
    print("This is pageCount after addition", slices)
    print("The page was added successfully")
    print("This is ", i)

def browse_file():
        global filename
        filename = filedialog.askopenfilename(title="Select a File", filetype=(("PDF    Files","*.pdf"),("All Files","*.*")))

        global pdf2, pageCount, i
        pdf2 = fitz.open(filename)
        
        

        # Create A Main Frame
        main_frame = Frame(root)
        main_frame.pack(fill=BOTH, expand=1)

        # Create A Canvas
        my_canvas = Canvas(main_frame)
        my_canvas.pack(side=LEFT, fill=BOTH, expand=1)

        # Add A Scrollbar To The Canvas
        my_scrollbar = ttk.Scrollbar(main_frame, orient=VERTICAL, command=my_canvas.yview)
        my_scrollbar.pack(side=RIGHT, fill=Y)

        # Configure The Canvas
        my_canvas.configure(yscrollcommand=my_scrollbar.set)
        my_canvas.bind('<Configure>', lambda e: my_canvas.configure(scrollregion = my_canvas.bbox("all")))

        # Create ANOTHER Frame INSIDE the Canvas
        second_frame = Frame(my_canvas)

        # Add that New frame To a Window In The Canvas
        my_canvas.create_window((0,0), window=second_frame, anchor="nw")

        btn2 = tk.Button(buttonframe,text="Save", font=('Arial',18), command=save_file)
        btn2.grid(row=1, column=7, pady=20, sticky=tk.W+tk.E)
        buttonframe.pack(side="bottom")
        
        for i in range(len(pdf2)):
            
            insClick = tk.Button(second_frame, text=f'Insert\nbelow {i}', padx= 50, command= lambda i=i: blank(i)).grid(row=i, column=5, pady=25, padx=50)

            numShow = Label(second_frame, text=f"Page number {i}",padx=200).grid(row=i, column=1)

launchInsert()
mainloop()