Hey Xiaohan W. - I might not know the exact nuance to your question as I'm not an active BedRock user but we support instrumentation through boto (AWS's internal library).
Is this the library you use? https://github.com/mustafaaljadery/anthropic-bedrock
If it's only using boto for authentication (and just calling REST endpoints) it might not work out of the box. Let us know if we can help! We support all the below through AWS' native bedrock SDK.