If Apoo wants to Lie, why doesn't he just gives himself credit
Maybe he simply said that Six Supernova teamed-up & defeated Kaidou & Big Mom, counting himself with Roof Five. And if Morgans sees through his obvious Lie, Apoo can just be like "How about you write it as i told you, and i will give you juicy CP-0 Pics in return"
However, they won't be credited equally, Zoro & Killer are Subordinates
While News will say that Luffy/Law Alliance defeated Kaidou & Kid/Apoo Alliance defeated Big Mom
Because remember, people know Apoo & Kid Allied, but they don't know about the Betrayal & Apoo being Secret Informant
So imo New Emperors are Luffy & Kid who will be credited for taking down Kaidou & Big Mom respectively
Followed by Law & Apoo with 2B Bounties
Just a random guess