I always wondered why all these stores are so fucking awful to filter. Is it calculated ?
Yes. I often find Play "hides" deep in the results apps that I had previously bought, even typing their exact name, in hopes I choose another (always paid or with ads) above them.
Previously installed apps and games used to be listed under the 'Library' portion of your user profile, now you can find them under 'Manage Apps and Device > Manage > Not Installed'.
Of those path segments, the first is a menu option, the second is a tab, and the third is a drop-down. It is almost as if Google doesn't want the user to find it, while making it technically available.