Question Samsung TV and Vizio Sound bar - Remote issues

[gford2022]

Samsung TV
Model: UN50NU6950F

Vizio Soundbar
Model: V21-H8

TV connected to soundbar using optic cable.

I cannot control volume of the soundbar using my Samsung remote.

I have googled it and here are some suggestions that HAVE NOT worked:
- Click on Source on the Samsung remote and select "Universal Remote" - No such selection available
- Remove and replace battery on Samsung remote - Did not help
- Remove and reconnect optic cable - Did not help
- Disconnect TV and soundbar power and re-connect - Did not help

So here I am.

HELP !!!

Thanks for any guidance