The model that you want to use - meta.llama3-2-11b-instruct-v1:0 can only be invoked with inference profile - us.meta.llama3-2-11b-instruct-v1:0.
model_id = 'us.meta.llama3-2-11b-instruct-v1:0'
See https://docs.aws.amazon.com/bedrock/latest/userguide/cross-region-inference-support.html for details.