ORO.FC.105 Designation as pilot-in-command/commander
Regulation (EU) 2021/2237
(a) In accordance with point 8.6 of Annex V to Regulation (EU) 2018/1139, one pilot amongst the flight crew, qualified as pilot-in-command in accordance with Annex I (Part-FCL) to Regulation (EU) No 1178/2011, shall be designated by the operator as pilot-in-command or, for commercial air transport operations, as commander.
Come on, your not just a PIC, you are a commander!
I love this one:
AMC1 FCL.050 Recording of flight time
(b) Logging of time:
(1) PIC flight time:
(i) the holder of a licence may log as PIC time all of the flight time during which he or she is the PIC
So they make it clear that a PIC logs his or her flight time as PIC. But how a commander should log his or her flight time? We must admit that the practice of logging as PIC while you are a commander is not a written rule.