Great question! I totally get wanting to keep your child safe while respecting their privacy.
For your Android S21 running Android 13, there are several apps available that can help you monitor text messages. Some apps can be set up to run in the background, so they aren’t always visible on the home screen. Look into apps that offer features like SMS tracking, call logs, and location services. After installing, make sure to go through the app’s settings to hide its icon from the app drawer.
Also, remember to regularly check the app to ensure it’s running smoothly and that you’re receiving the data you need. Hope this helps!