Presumably what you can see is a Club cabin consisting of rows 10 to 15, every seat of which is greyed-out and unselectable?

That's what's shown to someone making a new booking now for that flight, and is exactly what one would expect, given what EF is showing.

BTW, if you really are worried about this, one thing that hasn't yet been mentioned is that in the Club cabin, EF shows three blocked seats. They're unallocated, but currently blocked - and likely to be useable on the day because they're in bassinet positions and that's the obvious reason why they're blocked. (Sometimes seats may be blocked because they're known to be broken on the aircraft operating the flight, but that wouldn't really apply at the present time when no specific aircraft has yet been allocated.) That would mean that the aircraft actually has 17 unallocated seats at present that can be used for Club. In the context of a Club cabin that's officially got 48 seats, that's a huge number of (in effect) empty seats. This is why most of us are so confident that you will get to fly on this aircraft with the upgrade you've paid for. The primary uncertainty is about whether any seats in the First cabin will be needed at all, or whether the First cabin will simply remain closed.