Double click title bar makes app take up entire screen.

Is there a way in Big Sur to make a double click of the title bar of make the window take up the whole screen like it does in Catalina? At the moment when I double click the window gets bigger, and is vertically maximised, but not horizontally.

Just bought a new MBP and it's super frustrating that after 9 years of this feature on my 2012 MBP that I now have to reach for the keyboard for such a simple function. I do this literally hundreds of times a day and it's affecting my workflow.