Due to various integration improvements, as of SSL 360 v2.1.12 and above, in order for UC1 to see and control your Bus Compressor 2 / 360 Link Bus Compressor plug-ins you need to right-click on any Aux/Bus tracks in the Logic Mixer and select 'Create Track'.
Doing this adds those tracks to the arrangement page and allows UC1 to successfully discover them in your Logic Pro session.