I’m sure you’ve heard the news by now: Teams and Skype for Business will converge into one. Here’s the official blog post: https://blogs.office.com/en-us/2017/09/25/a-new-vision-for-intelligent-communications-in-office-365/
And other articles for reference:
SuphatraBernd Friedmann commented
The functionality is there. Just initiate a call through teams and it will give you a share menu on the bottom. works for video and just audio too.