Changelog for qgis-server-3.18.3-1.fc34.x86_64.rpm :

* Sun May 16 2021 Sandro Mani - 3.18.3-1- Update to 3.18.3
* Sat Apr 17 2021 Sandro Mani - 3.18.2-1- Update to 3.18.2
* Wed Mar 31 2021 Jonathan Wakely - 3.18.1-2- Rebuilt for removed libstdc++ symbols (#1937698)
* Wed Mar 24 2021 sandro Mani - 3.18.1-1- Update to 3.18.1