You can read the government's sentencing memo in which they asked for Ghislaine Maxwell to receive 30-35 years for the charges she's been convicted of....so far.
https://storage.courtlistener.com/recap/gov.uscourts.nysd.539612/gov.uscourts.nysd.539612.670.0.pdf
I think you are right. This is not a sentence handed down by a judge. This is the recommendation from the prosecutors. Very different thing.