They did use a 332 in 2019. A 321 went tech the previous day I believe. Must have been sent to collect the delayed and booked pax for that day. Can only guess they are using larger aircraft tomorrow to satisfy huge demand from COP attendees. I did notice that tomorrows Qatar service appears to be completely full.
Tomorrows TK- A333 is completely full in Business. Only flex economy available. Must be close to completely full.