Tdesktop: [Question] [Linux] How to change windows title bar to system theme?

[Samleo8]

I'm using Manjaro Linux, Gnome desktop environment 3.36.4 (Arch distribution).

Currently, my Telegram desktop title bar looks like this:

But I want it to be similar to my system theme like this (Firefox):

How do I change it, or is the title style locked in telegram? I'm not used to closing from the right hand side of the screen, and so this has become a bit annoying.

Things tried:
Before this update, when there were issues with my window styling, I changed it via qt5ct settings, and it worked. However, it does not work now.

Similar issue: #6388

[ilya-fedin]

or is the title style locked in telegram?

telegram implements custom titlebar

[kagestonedragon]

Settings -> Advanced -> System Integration -> Use system window frame

[Samleo8]

thanks @kagestonedragon that was the solution.. closing issue! :D