I don’t understand what “this is how he finishes it” means in this context? They haven’t listened to the message yet?
Doesn’t really matter, It’s clear there discussing it. His info during conference scene clearly shows he knows more than just Palpatine’s message, Boolio provided fleet info, Exegol name, 16 hours and basic whats going on with Palpatine, I doubt what they uploaded to R2 is just one audio recording of Palpatine explaining every piece of his plan.