The workspace is a very flexible way to manage tasks. The demo is of course also available in English.
A list of tasks still to be completed is of course also available, in German it is called "Unerledigte".
You can define several authors, several responsible users, you can define tasks as open if it is not yet known who is to take them over, etc.
The screenshots no longer show the full range of functions, sometimes development is too fast to keep them up to date
It's best to create a demo, then you can see if it's right for you or not