“Account deletion follows a very strict process.”
Ubisoft: ‘The Steam Deck has Windows Game Compatibility Developed by Valve, Therefore Requiring their Intervention’
Ubisoft Support France basically says it’s up to Valve to support their games on Deck.
Ubisoft CEO Yves Guillemot said back in July that if the Steam Deck is “big,” Ubisoft might consider bringing more of their games over to Steam, rather than resorting to their own Ubisoft Connect client. Considering that Valve has sold at least one million units (that was back in the beginning of October; they’ve probably sold far more than that now), and the rapid growth and popularity of the device, it seems like Ubisoft has finally acted on their wait-and-see approach.