Nope. I got C.62 from Germany when OPPO forced an update for me to get out A.52. Then, I got C.67 in France (immediately after C.62) but no C.68.
I still talk with OPPO Germany but for the moment the situation hasn't changed.
OPPO should update all European devices, doesn't matter from which EU country they come from and where they are in the EU. That's against the law.
If OPPO cannot deliver OTA updates correctly, they should put updated firmware on their website.