At the beginning of June, Warner Bros was faced with a tough decision that ultimately has led to Tenet being shifted further down in summer twice. Tenet was originally set for a July 17 date and the studio was allegedly prepared to push it back a lot further until Nolan stepped in and they landed on
August 12th. During a video meeting between Warner Bros and the Inception writer/director, Christopher Nolan asked that the movie become one of the first big-budget movies to hit theaters following months of concern of public gatherings, per The Hollywood Reporter.
Article source: https://www.cinemablend.com/news/2549906/christopher-nolan-reportedly-isnt-worried-about-tenets-box-office-performance