is often faster and more stable than trying to force-install an outdated or heavy APK. Third-Party "Wrappers" : Apps like SlimSocial Puffin for Facebook

Instead of the exact phrase, you could research:

Follow this guide carefully. Assume you have already downloaded the correct facebook_katana_88.0.0.0.23.70.apk file onto your computer or directly on your device.

Every Android app has a unique package name to differentiate it from others in the Play Store; for example, Facebook Messenger is known as com.facebook.orca . Seeing "Katana" on your phone is completely normal and simply means the standard Facebook app is installed.