Has there been any official word from pulumi on whether they'll be shifting to opentofu for the terraform based backends?

are provider packages going to be republished for opentofu?

My understanding was that providers are staying the same. So I don't think there's any shifting that Pulumi needs to do?

This also matches my understanding: the BSL license only affects the TF core, which Pulumi does not use. AFAIK, the gRPC interface of TF providers would not change, and TF Plugin Framework and TF SDK are both remaining truly open source.