Das ist Original US-Sprech:
"Biden’s Coronavirus Czar"
https://www.wsj.com/articles/huge-challenge-awaits-jeffrey-zients-bidens-coronavirus-czar-11608037209
"Vaccine czar apologizes"
https://newsinfo.inquirer.net/1397910/vaccine-czar-apologizes-duterte-gets-impatient
"Trump to appoint Jimmy Carter's pastor as 'reentry czar' to aid former prisoners"
https://edition.cnn.com/2020/02/03/politics/trump-jimmy-carter-paster-lowden/index.html
"Czar, sometimes spelled tsar, is an informal title used for certain high-level officials in the United States and United Kingdom"