The fact it’s actually being made is new.

Two years after acquiring global rights to ‘Warhammer 40,000’, Amazon MGM Studios has launched the development of a TV series based on the popular game.

The decision aligns with a critical timeline detailed in Games Workshop’s recent financial report, stating that Amazon and the game’s manufacturer needed to finalize creative guidelines by December 2024 to maintain development rights.

I think so, from Dec 2022, https://www.hollywoodreporter.com/tv/tv-news/henry-cavill-warhammer-40000-amazon-1235283251

This article just adds,

The project recently gained momentum with the assembly of a mini-room, where writers collaborated to outline a creative direction for the series.

This teamwork has now paved the way for the TV series to proceed into development, though a showrunner has yet to be confirmed as negotiations continue.

So I guess progress has been made… But not much.

There was a deadline of the end of this month to determine if they were actually going forward with it