As we’ve previously announced , we will stop supporting legacy v2.0 of the Content API for Shopping in favor of v2.1, which has been available since March 2019.for existing merchant accounts actively using v2.0  to September 30, 2021. However, we will not allow new merchant accounts onto v2.0 after April 30, 2021.  The account restrictions will not impact users accessing new sub-accounts via an existing multi-client account (MCA), provided that MCA has been actively making v2.0 requests.support  for your efforts to migrate to v2.1. We strongly encourage you to migrate to v2.1 as soon as possible. What do I need to know? version 2.1 of the Content API for Shopping  with major improvements to the API management experience for Merchant Center programs, including:
See the complete list of changes in the release notes  and the migration guide  to help with the transition.Content API for Shopping forum .What do I need to do?