sample allows for parameter broadcasting but sample_async does not

[zohimchandani]

Required prerequisites

• [X] Consult the security policy. If reporting a security vulnerability, do not report the bug using this form. Use the process described in the policy to report the issue.
• [X] Make sure you've read the documentation. Your issue may be addressed there.
• [X] Search the issue tracker to verify that this hasn't already been reported. +1 or comment there if it has.
• [X] If possible, make a PR with a failing test to give us a starting point to work on!

Describe the bug

The sample call allows for broadcasting but sample_async does not have this functionality.

Steps to reproduce the bug

NA

Expected behavior

NA

Is this a regression? If it is, put the last known working version (or commit) here.

Not a regression

Environment

NA

Suggestions

No response