Created attachment 1115670 [details]
The package doesn't ship AppStream  metadata file, so it doesn't appear in Pidgin profile in the default app catalog GNOME Software and is not easily discoverable and installable for users.
I've already filed a bug upstream  because it should be ideally included there since it's used across Linux distributions, but unless/until upstream ships it it should be included downstream as the packaging guidelines say .
I've created the file for you, see the attachment.
Thank you very much for the bugreport and willing make free software better.