ESA and the EU Commision have announced that the Sentinel-1B satellite cannot be repaired anymore. Since an anomaly in December 2021 the satellite did not provide data anymore. Since then, great efforts have been made to reactivate the satellite.
Unfortunately, without success. Now the end of lifetime was announced.
End of mission of the Copernicus Sentinel-1B satellite
RIP dear Sentinel-1B
Also worth reading: ESA - Mission ends for Copernicus Sentinel-1B satellite