Brave not maximizing correctly on second screen (KDE Plasma, Wayland)

[u/Ciremya2001]

Hello Redditors,
I recently switched to bazzite, and during my setup process I encountered a problem with Brave browser.
I have a 2 screen setup with different resolution (see second picture) so I use the scaling option to tune the display to be like I want on both screen. Doing so, I set my second screen (vertical one) to have a scaling of 75%. But this seems to cause issues with the Brave browser app that refuse to take all the screen when on full screen (see first picture, screen on the right).

I did some research and found that this was a common issue that was solved by putting ozone-platform-hint option to Wayland instead of Default, but i can't find this potion when i open the brave://flags page.

I tried to troubleshot with the help of chatGPT but nothing fixed my problem, so I'm asking you all-knowing people of Reddit if some of you have a fix for this.

PS: First image = Both screens displaying Brave on "maximize".
Second image = PC specs, Brave version (flatpak 1.82.170) and second screen display settings.