URL and License info might be not present in APT indexes. But they are definitely known for installed packages, but they are still not shown:

# pkcon get-details rpm
Сопоставление    [=========================]         
Получение подробностей[=========================]         
Запуск                  [=========================]         
Завершено            [=========================]         
Описание пакета
  package:     rpm-4.13.0.1-alt34:p10+308150.100.4.1@1668010392.x86_64
  summary:     The RPM package management system
  license:     unknown
  group:       admin-tools
  description: ackage management system capable of installing, uninstalling,
verifying, querying, and updating software packages. Each software ackage consists of an archive of files along with information about he package like its version, a description, etc.
  size:        3623168 bytes
  url:         
# 

(Loosing symbols in description is another problem: https://bugzilla.altlinux.org/show_bug.cgi?id=40826#c5 )

# rpm -q rpm -i
Name        : rpm
Version     : 4.13.0.1
Release     : alt34
DistTag     : p10+308150.100.4.1
Architecture: x86_64
Install Date: Ср 18 янв 2023 06:14:10
Group       : System/Configuration/Packaging
Size        : 3623168
License     : GPLv2+
Signature   : RSA/SHA512, Ср 09 ноя 2022 19:13:19, Key ID 42f343a2c7eb80f9
Source RPM  : rpm-4.13.0.1-alt34.src.rpm
Build Date  : Ср 09 ноя 2022 19:13:12
Build Host  : vt-p10.hasher.altlinux.org
Relocations : (not relocatable)
Packager    : Vladimir D. Seleznev <vseleznv@altlinux.org>
Vendor      : ALT Linux Team
URL         : http://www.rpm.org/
Summary     : The RPM package management system
Description :
The RPM Package Manager (RPM) is a powerful command line driven
package management system capable of installing, uninstalling,
verifying, querying, and updating software packages. Each software
package consists of an archive of files along with information about
the package like its version, a description, etc.
# rpm -q packagekit
packagekit-1.2.5-alt7.x86_64