Probably correct about Sweden leading it, but inspectors / investigators on the team should also come from non-NATO high-tech POL/diving nations like Brazil, Mexico, Chile, Indonesia etc.
That wouldn’t be a bad plan.
Of course here’s the punchline of the modern world: doesn’t matter. The only people who are going to listen to the results of the investigation are the people who were already thinking what the report said. If it says Russia did it none of the Russia backers are gonna listen. If it says America did it none of the Ukraine backers are gonna listen. If it says Green Peace did it nobody is gonna listen.
People only want info that conforms to their bias, everything else is a lie. Just ask them.