Opensearch 3 node cluster's diskspace was upgraded from 500GB to 600GB. The copying of shards to new nodes became stuck.

Opensearch's 3 node cluster's diskspace was upgraded from 500GB to 600GB. Step 3 of 4: The copying of shards to new nodes became stuck. "Copying shards to new nodes - 48 of 52 done" is still the status after more than two days. I verified all of the parameters in monitoring (CPU, JVM, and storage) and they all look good. cluster status in green. What can we do now??