Hey AnxiousParent_OH,
That’s a very common question. Generally, yes. If a monitoring app is installed directly onto the phone itself, it’s designed to capture the device’s activity. This often includes screen recording or keylogging.
This means it should capture what’s happening within the Instagram app regardless of which profile is being used—main account or “finsta.” The software monitors the application’s usage on the phone, not just a single account linked via login credentials. It focuses on the device’s overall activity, so you would likely see interactions from both accounts.