Like the project account said, the Mastodon bridge is done automatically, we don't opt-in to do that nor do we have control of it.
Also Mastodon bridges are likely to miss posts in larger threads, so I post on them here myself just in case.
There another Graphene account already nostr:npub1c9d95evcdeatgy6dacats5j5mfw96jcyu79579kg9qm3jtf42xzs07sqfm
Why use this Mastodon bridge.
Discussion
Yes thanks my question was more for user nostr:npub18m6az6939auxwgl3dvpq0slxglv6ez64fzhns5u5qstgdtedmxds9e47pz who retweeted -- uh what's this called on nostr, renoted -- the Mastodon one instead of the native nostr one.