PO.DAAC no longer archives the ChlA products. You could search the data directly from OB.DAAC site: https://oceandata.sci.gsfc.nasa.gov/api/file_search/.
PO.DAAC User Services
Welcome to the Earthdata Forum! Here, the scientific user community and subject matter experts from NASA Distributed Active Archive Centers (DAACs), and other contributors, discuss research needs, data, and data applications.