Is seat selection via finnair.com no longer possible? This is for a longhaul (TATL) IB flight. Finnair is able to pull up my reservation using the IB PNR but does not offer any facility to change seats. Was this capability taken away?

Any other way to view currently assigned seats throughout the plane (let alone choose seat assignment online)?

(I also noticed I had to login to finnair in order to even get to the "manage my booking" page, something I don't recall having to do in the past).