/Kjell kindly provided comments on Feb 27, 2021 concerning the four TKMS Type 212CD submarines Norway MAY buy from TKMS.
/Kjell's comments are supported by this Norwegian link dated Sep 11, 2018, which is easily (right-click mouse) translated.
Norway and TKMS signed an MoU for the Type 212CD subs in February 2017. See mentions of Norway 212CD here .
But in this 212CD project Norway wants to avoid the low industrial content level it suffered in Norway's purchase of six TKMS Type 210 Ula submarines in the 1980s. Type 210s are a specialised design only ever exported to Norway.
Within a more than US$5 Billion Norwegian Type 212CD purchase Norway wants a Norwegian industrial content (aka "cooperation") of around 75%. This is equivalent to more than US$3.5 Billion.
Norway is waiting for TKMS to settle on the 75% content/cooperation. 75% likely includes a Norwegian designed combat system [eg. weapons, sensors, computer terminals-data storage]. In April 2020 Norway rejected a third TKMS offer.
As at February 2021 a formal Norway-TKMS contract (more binding than an MoU) had not been signed.
After the contract is signed it will still take 8 years to deliver the first 212CD to Norway. So Norway may need a life extension for its six Type 210s. [Pete suspects one of those 210s may need to be decommissioned and then cannibalized for spare parts].