Same issue with expired builds, though I am mostly just trying to submit a new build. Since I can't delete the expired builds, AppStoreConnect will only let me choose one of the expired builds to submit for review. I don't care so much about deleting the expired builds as about adding a new one. My iOS App status is "1.0 Rejected" and there seems to be no way to change it to "1.0 prepare for submission." So aggravating.