How to properly add the function of sending a message to the user?

Question

Python

Hello, I use the telebot library, there are several message handlers and callback query handlers, a separate function for sending a message to the user if he is in the bot database.

When importing another file, in which there is only one function (the function in the loop through twisted), the bot does not respond to messages (Most likely due to the function loop). What is the right way to call the function of sending a message to the user from the main file from this function and not interrupt the work of the handlers?

So far, I have only reached multiprocessing, but somehow I crookedly twist everything into classes and in the end nothing works.

Short example:

spoiler

import mysql.connector
import telebot
import urllib3
@bot.message_handler(commands=['start'])
def send_welcome(message):
    bot.send_message(message.chat.id,
                     "Привет.")


def send_to_user(abcp_id, number, comment, id_from): # вызывается из отдельного файла
    number_html = f'<a href="https://{domain}{method}={number}">{number}</a>'
    text_to_user = number_html  + comment
    sql_check = f"SELECT * FROM to_notify WHERE number ='{number}'"
    ex_check = cursor.execute(sql_check)
    print(cursor.execute(sql_check))
    print(type(ex_check))
    result_check = cursor.fetchall()
    print(result_check)
    sql = f"SELECT * FROM staff WHERE id ='{_id}'"
    cursor.execute(sql)
    my_result = cursor.fetchall()

if __name__ == '__main__':  ...