The issue has been resolved and replication to the Search store is restored in the affected region us-west-2.
A fix has been deployed and we are monitoring the recovery of replication to the Search store in the affected region us-west-2.
We have identified the root cause blocking data replication in this region and working on mitigation steps.
We are investigating an issue with degraded data replication to the Search store, affecting databases in region us-west-2.
Impact: Newly inserted records or updated column content are not available for Search.