Yes, if you are granted TPS, you must re-register with the USCIS for each period that your TPS benefits are extended. To re-register, submit a completed Form I-821, Application for Temporary Protected Status, and Form I-765, Application for Employment Authorization, during the period stated in the Federal Register notice of extension of the TPS designation. If you do not re-register each period, your TPS will be withdrawn.
If your application for TPS is denied, you will receive instructions telling you whether or not you are allowed to appeal the decision. Instructions on how to appeal will be included in the notice of denial.