They will all be categorized as Czars so they do not have to be confirmed by the senate.
Blinken is being nominated for Sec of State - he does need confirmation. John F’n Kerry for Climate Cxar, no.
Biden Chooses Antony Blinken, Defender of Global Alliances, as Secretary of State
https://www.nytimes.com/2020/11/22/us/politics/biden-antony-blinken-secretary-of-state.html