Spot On. All access around the station has now been closed plus services will cease to call at British Steel Redcar after Saturday 14th December 2019 - the stops have been deleted from the winter timetable data. The station is indeed being mothballed (i.e. not officially closed) indefinitely, exactly like IBM Halt.
Indeed, there is a thread about it. https://www.railforums.co.uk/threads/redcar-british-steel-to-stop-being-served-temporarily.192037/