Even jojoveller says that tusk act 4 hability to transcend dimensions CRUSHES fv hability to travel between parallel universes. Even in the boundaries between dimensions and use said dimensions as a shield (this is literally what love train is) to protect the gap in space, fv couldn't tank tusk act 4 gravity. As we can see in this image : https://static.wikia.nocookie.net/5fb4a9ff-ebed-4e4f-816e-a8389bdf748a

static.wikia.nocookie.net

In order to control gravity, tusk act 4 pierce other dimensions ( with ball breaker being stated to be capable of outright breaking them). Since love train uses an infinite amount of parallel universes as a shield ( it's called dimensional walls several times and it's said in jojoveller that ball breaker can break these dimensions and the same is said by fv, while searching for info about lt, at jojoveller i also found that d4c lt transcends these dimensions in the sense that he is not in any of them, but in the space between them and love train takes d4c hability to allow worlds to exist in the same place to a whole new level. All these dimensions ''merge'' together to form the light of love train ( it can even be touched but without a strong gravity to destroy them, it will just send the atttack to another part of the world). I came to the conclusion that tusk act 4 controls the gravity of all these space times at the same time, that's the only reason it could bypass love train and reach the gap where fv lurks. affecting 1, 2 or even 1000 dimensions wont matter because there is an infinite amount of them.

I came to the conclusion that tusk act 4 and ball breaker are the strongest gravity related habilities in the whole canon series ( with mih in third place).