Brave browser for PC, the tab for the currently open page is not clearly visible.

I am currently using the Dark mode of Brave browser on my computer, but I have an issue. When I have multiple tabs open, I can’t tell which one I currently have open in the tab bar because the visual presentation is too subtle compared to Chrome.

Unless I turn the screen brightness up very high, but a very bright screen causes a stinging sensation in my eyes

Given a somewhat similar issue:

Cannot see that tabs are selected, when Windows 11 Mica activated - #6 by 289wk

You might consider finding a Brave Browser theme that improves the visibility of the selected tab.