Hello @Robin Huang , Thanks for reaching out to us on this topic and contributing this question which helps others as well.
Below is the response from Product Team, I hope this helps with your query.
" Thank you for the feedback. Today this feature is not supported through our APIs. We have added the request to our backlog".
Please make sure to keep following the Azure Maps Documentation for further updates.
Please let us know if you need further help in this matter.