Will my status check be viewable on EH's DBS System (First Advantage)?

No. The DBS Update Service and First Advantage are two entirely separate systems. First Advantage only shows checks that have been completed through their system and does not allow checks to be added retroactively.
England Hockey will record all status checks the same way that we do those performed through First Advantage. We will also inform the club’s/association’s DBS verifier of the outcomes of ‘Valid’ status checks and add it to our central database as a record.