Are 'The Witcher' Games Part of the Fictional Universe's Canon?

It's no secret that 'The Witcher' games were instrumental in bringing Andrzej Sapkowski's work to the masses, but are they canon?

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So Cthulhu is canon in the Witcher universe good to know : r/witcher

The Witcher: Enhanced Edition (2008) - MobyGames

The Canon Ending to The Witcher Trilogy!, -, ¡El Canon que termina con la trilogía de Witcher!, Eng - Esp!

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The Witcher series, Witcher Wiki

I don't care what Sapkowski says about “fan-fic” game canon, this is the ending of the series for me : r/witcher

User blog:Executor N0/Personal Blog: How To Make Something Canon, VS Battles Wiki