The new VU Collaborate Discussion Topic creation is coming at the end of April 2023 and is enabled as an opt-in feature.
You can (A) leave it on, (B) Turn it off, and you will be able to (C) switch between the old and new interface as desired until the end of this year.
This enhancement will bring the Discussion tool in line with the Assessment Dropbox and Quizzes create/edit interface.
