@Override
      public boolean isCompatible() {
        // If Tink is not in FIPS-only mode, then no restrictions are necessary. In FIPS-only mode
        // this returns True if BoringCrypto is available.
        return !useOnlyFips() || fipsModuleAvailable();
      }
The algorithm has a FIPS validated implementation if BoringCrypto is available.
java_src/src/main/java/com/google/crypto/tink/config/internal/TinkFipsUtil.java