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
Settings->Accessibility->Large Text ON
It will increase all text size including title bar text.
I’m on xfce and didn’t find that option. All I see is assistive technologies, keyboard and mouse. Is that for gnome?