The Importance of Determinism in Constructive Theory

In the many world's interpretation, constructive theory is a pretty much deterministic view where it doesn't really leave any room for saying that there are certain possibilities that just never actualize. And kind of, you know, that other approach might leave room for indeterminism. Would you say that the determinism is kind of assumed a priori for constructive theory? I think not necessarily in the sense that determinism is or anything like that. However, when we go particularly to things like the constructive theory of information, for example, where we lay out these principles that are needed for info to be physically possible, then it's implicit in some of these principles that it must be possible.