Does Quicksight directly support Opensearch Serverless?

I'm attempting to connect an AWS Opensearch Serverless collection to Quicksight in the Frankfurt Europe Region. Opensearch Serverless is configured to a VPC. Quicksight also has a configured VPC connection. The available Dataset types include AWS Opensearch, but not Opensearch Serverless specifically. The Add Dataset for Openseearch dialogue allows selection of my VPC connection, but doesn't populate my Opensearch Serverless collection in the 'domain' field. There's no collection field. I can't type the collection into the Domain field and have it accept the input.

I'm wondering if it's only the regular provisioned version of Opensearch that's supported. Or perhaps I have a permissions problem. Before embarking on IAM debugging, I wanted to confirm the services are compatible in the first place.

Can anyone confirm?

Thanks, Colin