Start Menu Search Only Shows Native Apps?

If I apply everything in the list searching in the start menu only shows native apps.

For example, if I have the native calculator and libreoffice installed, you'd expect to see the calculator & libreoffice calc appear when I search for "calc", but only the native calculator is shown. I can still scroll through the list of installed apps to find libreoffice calc.

I've tried reverting only those fixes which seem somehow related but haven't been able to find which fix causes this behaviour.

Reproduce the Start Menu search with native Calculator and LibreOffice Calc installed, then compare searches for “calc” with the listed-apps view. No files, tests, or entry points are named, so first locate the repository code that applies the relevant privacy fixes and handles installed-app visibility. Done means third-party apps such as LibreOffice Calc appear in Start Menu search results.

Written by the indexing model from the issue text.