Here’s my take on this.
Finding an Instagram password directly from a username is nearly impossible due to modern security and encryption. Most legitimate monitoring tools that claim to do this don’t actually “find” the existing password. Instead, they typically work by installing an application on the target device itself.
Once installed, this software can use a few different methods. The most common is a keylogger, which simply records every keystroke typed on the phone, capturing the password when the person logs in. Other tools might be able to access credentials that are already saved in the phone’s web browser or keychain. It’s less about hacking Instagram and more about capturing the information directly from the source device.