I use a small notebook so it comes in handy to double the title bar to have space to increase the title font to 16 or 18
On debian 12.11 this was the case, but I don’t remember how I configured it or what style I used. The style I now use on debian 13 is adwaita
What the hell are you talking about?
Do you mean with “appearance style” the desktop environment? Or the theme of a specific DE?