Facebook Audiences Connector limited

Rookie Contributor
Hello community,
I was working on a connector between Tealium and Facebook in order to push audiences to Facebook Ads so that we can remarket them.  
Normally you're able to create audiences based on a Facebook Pixel which tracks website traffic and starts populating an audience in Facebook Ads Manager. Now when I wanted to do this via Tealium I only see the option to add people to an audience based on e-mail or telephone number. This would of course drastically reduce the size of the audience. 
Is this correct or am I missing something?