This is a QGIS plugin to search for a commune and a parcelle in the French cadastre. It uses the French Cadastre and Geo API from IGN and the French government. https://api.gouv.fr/documentation/api_carto_cadastre
The plugin appears as a dock widget on QGIS.
First search for a commune by typing a few letters and select it in the suggestions.
Then select the section
Then type the parcelle number and click "Rechercher". The download can take a while. If the parcelle is found, the map zooms to it and the contour of the parcelle is shown as a blue line.
If the section or the number are not entered, you can click on "Rechercher" to zoom to the commune outline and display it.