Here's a Python script for a Telegram channel auto-report tool that works in Termux. It uses the Telethon library for interacting with Telegram's API.
To use this in Termux:
pkg install python
pip install telethon
pkg install python
pip install telethon
python telegram_auto_report.py
python telegram_auto_report.py
Note: Use responsibly and be aware of Telegram's terms of service. Excessive reporting may lead to account restrictions.