Presumably for those reasons and more, DICE also added a setting to Battlefield 2042's accessibility menu which lets you change the concussion grenades' white light to a black field.

Battlefield 2042 Update 1.2 is now live, changing and reshaping the war-focused first-person shooter in response to multiple rounds of player feedback.

Now, press the three-dot menu button present under the Battlefield 2042 game title. Next, click on the Verify option and follow the onscreen guide to finish the process.