Answer:
No such feature for increasing the load up to failure exists with regard to the design of reinforced concrete structures.
As an alternative, you can proceed as follows:
Create a separate load case or load combination for each load increment. This can be done using load factors, for example.
Then, select the individual load cases or combinations in the add-on module.
After performing the calculation to the point "Provided Reinforcement" for the first time, you can adjust and save the existing reinforcement proposed by the add-on module.
Finally, you can carry out the nonlinear analysis on the basis of the defined reinforcement.
The existing safety or the available utilization can be evaluated graphically after successful calculation.