Ok my warning alarm is going off. If you don't know Bellingcat has been at the center of some very shady assertions on "intel" they gathered, and thus I find this coming from them to be highly suspicious. I would caution people to not jump to conclusions on this one till more evidence is out, and keep in mind Bellingcat isn't trustworthy.
Edit: for instance just looking at their Wikipedia pages, there doesn't seem to be any story that makes the leaders of five-eyes countries look bad, aside from Trump, but I can think of several suspicious things from Trudeau to laptops. I think it is valid criticism to suspect of such a focus around Russia.
The last one i found egregious was Wagner going to a French FOB in Centrafrique (RCA) (the French army left a day prior) to bury african corpses. In daylight, speaking russian, not checking for camera, not jamming low-altitude drones.
Obviously the French army kept the footage and waited to see who woultd publish the "French army killed locals and buried them" story.
While when you have suspicions about recent USA operations (this leak non-wistanding), you find nothing.
That's why i know for sure nord stream 1 and 2 were not done by Russia (we would have evidence already) and i suspect it's not the US that planned the destruction (or at least not the usual department) because of the boat we saw.
Bellingcat itself share techniques and tools it use openly. You can think they choose what to report on, but when they do it is liekly to be true, and you always can check yourself.
What i really like is that they give the tools to "do your own research" quite often, and that make them harder to deny.