Clients still using Clover ETL with MDM V11.x will no longer be covered by IBM sponsored support agreements with Clover as of October 1, 2021.
IBM removed Clover ETL from it's Master Data Management offering in 2016 and the last version of MDM to bundle Clover ETL was 11.3 (which had an EOS date of September 30, 2019).
As an existing client upgrading to MDM 11.4 (or later), you were offered a choice of using the now bundled DataStage offering for your ETL needs or remaining with Clover ETL. If you chose to continue using Clover's ETL, IBM and Clover worked together to secure you perpetual licenses for the stand alone Clover ETL product, and IBM also agreed to cover support costs until October 1, 2021.
If your organization intends to continue using Clover ETL with MDM beyond September 30, 2021 and will require continued support, you will have to contact Clover ETL directly to purchase a support contract.