I mean, she sure did, and I bet Silvervale is grateful for this, but it may have just been a fraternal gesture as a fellow VTuber rather than support from a friend. Assuming that Silvervale is telling the truth, receiving public support from someone, yet not talking to them for 7 months straight doesn't sound like friendship to me.
It's possibly yet another instance where both parties fail to establish boundaries, thus having contradictory ideas of their relationship, including obligations. Assuming it's not the case, I believe it's not yet too late for them to clarify it and make up.