as you may already know, Sentinel-1B no longer delivers images. This has been the case since the 23th of December 2021.
For further informations, there is regular news on the Copernicus website (Copernicus Sentinel-1B anomaly (3rd update) - Copernicus Sentinel-1B anomaly (3rd update) - Sentinel Online)
We hope it will not last too long so the monitoring will not be so impacted.
Diane Heymans for Sen4CAP team