Considered adding a Serverless version of the OpenSearch service?

[fankaibo]

amazon-transcribe-live-meeting-assistant

I got the Qnabot information from the above repository and jumped here.
The OpenSearch service is mentioned in LMA (live-meeting-assistant), but even if the service is not used, there will be OpenSearch node operation fees, so I would like to make a request, can we add a ServerLess version to save costs? I will post the source link here.
aws-samples/amazon-transcribe-live-meeting-assistant#171 (comment)

[rstrahan]

And, if using QnABot with Bedrock KB, allow them to share the same Opensearch Serverless instance, if that is possible.