Nordstream is also special because its destruction was not aligned with Russia interests. It limited Europe capacity to import Russian gaz lifting one of the reason which might have made the EU reluctent to fully support Ukraine (and causing a major economic crisis in Europe as a side effect).
Between this and the coyness of most European countries governments at the time to comment on investigation, it's not too far fetch to think that Ukraine might be involved.
Between this and the coyness of most European countries governments at the time to comment on investigation, it's not too far fetch to think that Ukraine might be involved.