Not much. IJCAI-ECAI 2022 has done major efforts and sent numerous reminders to reviewers to remind of the deadlines. While the vast majority of reviews has been received and further ones are coming in,  some reviews will not arrive in time for the rebuttal.  Further reviews have been or will be solicited and at the decision time, there should be enough information available to make an informed decision. At this stage,  we can only ask all reviewers with still open reviews to complete them as soon as possible.