Project: QGIS
Version: 3.34
The new "Calculate expression" algorithm will calculate the results of a QGIS expression and make the result available for use in other parts of the model.
It avoids the need to use the same expression multiple times throughout a model if the same result needs to be used more than once and provides additional use cases (such as generating a static timestamp value for use throughout a model).
This feature was developed by Nyall Dawson