It appears they may need more metadata about packages.

The example "Finding an Ada PDF library" is https://alire.ada.dev/search/?q=pdf. That leads to https://alire.ada.dev/crates/apdf.html, with

    Apdf
    Standalone, portable package for producing dynamically PDF documents

    Author: Gautier de Montmollin
    Maintainer: fabien.chouteau@gmail.com
    License: MIT
    Version: 5.0.0
    Dependencies: No dependency.
    Tags: No tags.
    Badge: [Copy image location: https://img.shields.io/endpoint?url=https://alire.ada.dev/badges/apdf.json]

Searching for Apdf points to http://www.a-pdf.com/, which doesn't look like it's Ada-ish. Is Apdf https://apdf.sourceforge.io/? [Ah, yes it is.]