Im new to FCP and editing but if im not mistaken and the multi cam shoot was logged correctly, its as simple as selecting all the clips in the browser & creating a MULTICLIP which must be synchronized using the TIMECODE. Then the multiclip must be loaded in the timeline & ‘Sync-ON’ should be selected from the Viewer.
This should give us multiple Video-Audio feeds which are in sync with the timeline and can be edited seamlessly.
In the end it should look somewhat like this
