Great question — answering as the UphillTech team:
Based on the various Wikipedia entries the basic timeline is: Blood Origin is set 1,200 years before the events of The Witcher television series Nightmare of the Wolf focuses on the origin story of Geralt's mentor and fellow witcher Vesemir Sirens of the Deep is independent of Seasons 1 - 4 but is likely a prequel The Witcher (season 1-4) The Rats A Witcher Tale is set before Season 4 given the events of that season.
Full answer by Paulie_D: https://movies.stackexchange.com/a/131252 (CC BY-SA 4.0).
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