async def main():
    tasks = []

    for _ in range(10):
        task = asyncio.create_task(waste_time()) # создаем задачу
        tasks.append(task)
        await task # ожидаем выполнения
        # итерация завершена, переходим к следующей

import asyncio 
from time import time, sleep


async def waste_time():
    print("Start work...")
    await asyncio.sleep(2)
    print("End work!")

async def main():
    tasks = []
    for _ in range(10):
        task = asyncio.create_task(waste_time())
        tasks.append(task)
    await asyncio.gather(*tasks)

asyncio.run(main())

import telebot, requests, bs4
from bs4 import BeautifulSoup

bot = telebot.TeleBot("TOKEN")

def pars():
    page_link = 'https://random.cat/'
    response = requests.get(page_link)
    html = response.content
    soup = BeautifulSoup(html, 'html.parser')
    obj = soup.find('img', attrs={'id': 'cat'})
    return obj.attrs['src']
    
@bot.message_handler(commands=['rcat'])
def randomcat(message):
    bot.send_message(message.chat.id, pars())

bot.polling(none_stop=True)