How to stop taskbar from detaching from screenedge

I just installed bazzite and I am annoyed at the taskbar. I like the windows style where it is just at the bottom, always as a stripe that completely fills the screen (see second screenshot). But when no Window is maximised, it detatches and becomes rounded (see first screenshot), which i find unpleasent. I haven't found the config file for the taskbar to change it myself, and the setting aren't helpful either (I can disable the behaviour to expand when a Window is maximised, but not make it permanent)