In a new tweet, Partner Director of Design at Microsoft, March Rogers, has confirmed that there are no plans to introduce a customizable UI transparency slider on Windows 11, after users asked for a feature similar to the Liquid Glass slider that was recently added to the next version of iOS.
For a long time, Windows has featured transparency and blur effects. However, Windows has never natively supported adjusting how strong those effects are. Users have the option to turn transparency on and off, but there's no fine-tuning options for those effects to be found in the OS.