From the Material3 Design Guide:
Dialogs can require an action, communicate information, or help users accomplish a task. There are two types of dialogs: basic and full-screen.

Proposed method signatures
SimpleDialog.build()
.title(R.string.hello)
.msg(R.string.hello_world)
.fullscreen() // or with true/false argument to en-/disable
.show(Activity.this);
Links
From the Material3 Design Guide:
Proposed method signatures
Links