These features will officially be introduced in early December when Patch 2.3 goes live. This update will also be accompanied by many bug fixes and other improvements, which will be detailed upon release of the patch.
In the coming weeks, Diablo II: Resurrected will be launching its first ever Public Test Realm (PTR)
The primary focus of that PTR will be revolved around fixing database issues and stabilizing our online environment. Once we are confident these fixes are in a good place, we’ll share more details on Ladder rank play and even more new changes coming to Diablo II: Resurrected.
So patch 2.3 early December, then PTR i would assume mid December, then info on ladder and other changes.