At this time, you can't restore an ad unit once its been removed.
All ad serving and settings associated with a removed ad unit are disabled, and you can no longer access the ad unit from the app page.
However, you can still view the ad unit's historical data if it generated reporting data for the selected date range in a report.
Check out the newly launched Diversity in Gaming website, where you can find video stories and written pledges from global gaming developers. This campaign centers on 3 pillars: diverse teams, diverse games and diverse audiences showing how diversity is not just good for gamers, but for business as well. Show your support by taking the pledge to promote DEI in Gaming and share it on social!