It would be best to have a functionality in 'Approval' action, wherein the needed approval action can be bypassed after 'x' number of days.
For example. A request is routed to a specific person or group. If the action of approval/rejection is not executed within 5 days. The flow should continue as if the approval process is bypassed. 😃
e.g. Leave request - the manager is too busy and forget about it, considered it approved after x number of days