Updating Extract when Document understanding model have had changes

I don’t agree with this.
If you label new documents it won’t automatically trigger any re-training, you have to do that yourself and then once the training it done set the newly trained model as the ‘active’ one in the AI Center.
At that point you do not need to change your automations, it will be using whichever version you have set in the AI Center.

If you add new fields to a document thats a trickier job, not only do you need to retrain but also update code.