what if this was indeed a Ukrainian operation? Do we attack Ukraine?
You will never prove it - because Russian UAVs were used.
Germany has literally, right now, in their custody the man that masterminded the Nord Stream explosions. They still don't want to tie it Ukraine.
Poland had one of the divers, and Germany demanded extradition, but Poland didn't do anything - until the man peacefully left in the vehicle of the Ukrainian military attache in Poland. Unfortunately, the man died afterwards on the frontlines...
Your governments are not stupid. They see Zelensky's game, and they tolerate it - because right now Russia is the bigger threat.
The hope is that you are carefully taking notes, and formulating some pragmatic way of dealing with Ukraine in the future. They are slippery f*ckers...