Careers should be embedded in ALL subjects. The Compass tool only asks about English, Maths and Science and these should be used as an indicator of how a school is performing against this benchmark.
It is important that subject leaders and teaching staff are aware of the benefits of linking their subject area to careers. One benefit for option subjects can be an increase in the number of students choosing their subject at GCSE if they understand the relevance and possible career outcomes, they may even continue to A-level. It is true that subject leaders may have little capacity to lead on this but you could look at your wider staff and identify career champions or ambassadors in each subject area.
We are developing an admin function on our Tracker tool which will allow the Careers Leader to give access to other staff members who can enter activities for their own year group or subject area. If used effectively the Careers Leader will have a complete overview of what is being delivered across the school.