Starting v12.27, users on iOS 14 won't get new updates on the App Store for Truecaller. This is because we're dropping the support for iOS 14 to support some of the new features that Apple launched in iOS 15 & 16.
However, the app will continue to work for iOS 14 users, and essential features like Caller ID and SMS Filtering will work somewhat less effective.
To continue to get the best spam protection, please update to iOS 15. All iPhones that support iOS 14 support iOS 15 as well.
You can learn more about how to update your iOS here: https://support.apple.com/en-us/HT204204