can Teams Audio Conferencing add-on license be added in O365 business premium?

Hi Marvin Oco,

Yes, you can add audio conferencing to Business Plans

And FYI, audio conferencing will be part of the Business’s Voice package along with Phone System and call plans when released to the rest of the world in a few months. This will also be able to be added to the Business Plans. It’s currently out here in the UK at the moment

Hope that answers your question

Best, Chris