Logistically I can see them fitting us in for one, either the 3rd or4th hull off the line but their own navies would be screaming if you got any more than that until they had sufficient boats on line to become operational. My guess anywayI have a hard time buying this as a serious proposal, given how the Germans and Norwegians have 6 and 4 boats of that class already ordered respectively. That isn't even considering the 3 and 2 additional boats likely to be added to the previously mentioned orders by those nations respectively. Then you have nations like Poland who are looking at the Type 212CD as well at the same time we are.
Where is the room there for Canada to receive its 12 boats? I don't see it in the slightest. Even if they let us jump into the queue somewhere to alternate deliveries, Canada is getting the larger Type 212CDE variant and Topshee wants the first boat delivered by the early 2030's now as far as I know. Sounds like the Germans are biting off more than they can chew to me and are hoping to snag Canada, only to slow roll us after some initial concessions.