From what I can tell they don’t have a Facebook page, I don’t believe posts sync between threads and other meta products regardless

They don’t make exactly the same posts between the accounts, but comparing similar posts around the same time

https://mastodon.social/@protonprivacy/113679615854243807

31 comments 156 boosts 254 favorites

https://www.threads.net/@protonprivacy/post/DDpVjPooFxM

2 comments 2 boosts 45 likes

https://bsky.app/profile/proton.me/post/3ldnvyof5zk2u

60 comments 159 boosts 729 likes

While their bluesky is significantly higher, it’s important to note they elected to keep their threads account which has a small fraction of the interactions of either

The math clearly shows that Mastodon is the one to cut