There are 3 repositories under ngrok-script topic.
Use Ngrok In Termux With Advanced Options
Run Plex Through Ngrok to Bypass CGNAT or Double-NAT Scenario
Open source client for ngrok
Does your ISP use CGNAT, or just hates everyone and blocks port-forwarding? This is for you!
Telegram bot to automate ngrok service in Python
termux-ngrok
This is a bash script made for ngrok use in automated environments.
Ngrok Runner with notification(telegram) and webhook support