In a political and intelligence sense "appears to be" is a rhetorical tool for propaganda purposes, or / and to cover you ass.
He could say "We have no evidence of this being sabotage and further speculation is not useful at this point”
which is what he says, from one perspective.
On the other he is framing a conspiracy theory:
"Something happened that appears to be sabotage and sabotage would be done by the enemy. " and the European media has been stuffed full of conspiracy theories during the entire conflicts.
Educationally you can look at the Nord Stream pipelines sabotage.
Nearly every EU and US source writes in big letters that Russia was behind it.
After a while, it became nearly impossible to keep that conspiracy theory alive.
Sweden and Denmark ended their investigation into the matter with no conclusion drawn
The present narrative is that the sabotage was done by a Ukrainian team with a shoe string budget:
A Drunken Evening, a Rented Yacht: The Real Story of the Nord Stream Pipeline Sabotage
Private businessmen funded the shoestring operation, which was overseen by a top general; President Zelensky approved the plan, then tried unsuccessfully to call it off
https://www.wsj.com/world/europe/nord-stream-pipeline-explos...