A community note added to her post said: “About 90,000–100,000 French soldiers were killed during the Battle of France (May–June 1940), when Germany invaded. Around 92,000 is the figure most commonly cited.”
Article source: https://www.huffingtonpost.co.uk/entry/reforms-sarah-pochin-condemned-over-world-war-2-jibe-at-france_uk_6a717af2e4b02974827ae3c8