BGP wan-bridge

Hi,
I have a MT to act as a BGP router and I’d like to have a direct external IP address for some of the devices behind it. What would be the best way to achieve it? should I just create a wan-bridge with BGP interface and some other interfaces in it?

I have a thread asking similar questions about using a layer 3 interface on a bridge interface. I know this is 4 years later but did you ever get an answer?