This action in the General tab refers to requests that are saved as a draft by the requester. When the period has expired, the request is forwarded to the next person in the process. After that, only automatic actions assigned to the workflow steps are taken into account.
This feature only works if the job WfCheckLimits runs regularly; in the system parameters "Shark Properties > additional properties", the following line must be modified.
LimitAgentManagerClassName=at.workflow.webdesk.wf.sharkimpl.extensions.StandardLimitAgentManager