Async doesnt work Flet App UI Error

[ssaravanan384900712]

I want to Run a function every 10 seconds in background, but my flet app doesnt start

import flet as ft
from flet_route import Routing,path
from landing import *
from page import *

def main(page:ft.Page):
    
    app_routes=[
        path(url = "/",clear = True,view = Landing),
        path(url = "/first",clear = True,view = First),
    ]

    Routing(page=page,
            app_routes=app_routes)
    page.go(page.route)

ft.app(target=main)

this is my landing.py haiving the background function to be called every 10 secs via async

import flet as ft
from flet_route import Params, Basket
from time import sleep
import asyncio
from datetime import datetime

def Landing(page : ft.Page, params: Params, basket: Basket):
        title = ft.Text("Testapp".upper(), size=28, weight="bold")
        subtitle = ft.Text("routing testing", size=20, weight="bold")

        def func2bcalledevery10s():
            print("hi")
            c = datetime.now()
            current_time = c.strftime('%H:%M:%S')
            subtitle.value=current_time
            page.update()
            pass
        
        def time_change(e):
            func2bcalledevery10s()


        product_page_btn = ft.OutlinedButton("Check Time", icon="ARROW_UPWARD_SHARP",on_click= time_change)

        async def functhatcallsabovefuncevery10s(func):
            while True:
                func()
                await asyncio.sleep(10) 

        return ft.View(
            "/",
        controls = [
            # cart_logo,
            ft.Divider(height=25, color="transparent"),
            title,
            subtitle,
            ft.Divider(height=10, color="transparent"),
            product_page_btn,
        ]
        ) 
        asyncio.run(functhatcallsabovefuncevery10s(func= func2bcalledevery10s))

Without the last asyncio.run(functhatcallsabovefuncevery10s(func= func2bcalledevery10s)) my app is working, but when i want to add the background task my flet app doesn't start

please guide, how to async function calls alongside with other Flet UI components