Link a Textract async operation with downstream process

I have a simple setup with one Lambda function that starts a Textract analysis of a document via StepFunctions.
The textract task in the StepFunction definition sends a notification on an SQS which triggers another lambda. I have little to no control on what message is sent in the SQS by textract since it's a predefined aws task.

Everything is patched with Xray and what it's seen from console is essentially this:
(client) -> LambdaA -> StepFunction -> Textract
(client) -> LambdaB (this one has been triggered by the SQS message)

However I was wondering if it is possible at all to link the two flows in Xray and see them as one trace_id or linked traces.

Can two traces be linked manually with the SDK?

Empieza revisando las APIs de tracing de AWS X-Ray SDK for Python y los puntos de integración de Step Functions, Textract, SQS y Lambda descritos en el issue. Determina si el SDK admite vincular manualmente estos flujos en una única traza o en trazas vinculadas, y documenta el resultado admitido o la limitación.

Escrito por el modelo de indexación a partir del texto del issue.