Lemmatization Plugin for AWS OpenSearch

Hi there, I'd like to know the following :

1. When is AWS OpenSearch planning to offer lemmatization feature in the service ?
2. If not, there seems to be a plugin in OpenSource for doing this called LemmaGen but OS doesn't seem to have the feature to allow custom plugins. When will custom plugins be made feasible in AWS OpenSearch ?

Ref: https://repost.aws/questions/QUqd_nICZlReKT8Y8IPfPOWA/custom-plugin-on-aws-opensearch