How can you manually adjust the AOD brightness on Galaxy phones updated to One UI 6.1?

In this video, you will find out the way to get back the AOD brightness slider on the Galaxy phones updated to One UI 6.1. Other links: Samsung Galaxy phone Q&A (English) https://www.fonguide.com/forums/ Samsung Galaxy phone Q&A (Chinese) https://www.fonguide.com/shequ/samsung/