There's a lot of deck coatings out there…so why aren't there that many at ICC-ES website where Division 7 Pedestrian Traffic Coatings are listed? 

Because many of them haven't tested their systems at independent labs where their deck coatings are burned, heated, chilled, blown on and abraded, denigrated and abused. Probably because they know their coatings wouldn't pass the srtingent required battery of tests that must be passed to become a real deck coating.

Find your next deck coating by searching ICC-ES Division 7 listings here http://www.icc-es.org/Reports/index.cfm?csi_id=301&view_details

Class A Fire rated, some are One Hour, all are tested and proven to meet the code requirements under the tests they were submitted too. Always read the report completely and be sure the product meets your requirements. 

Solid surface decks offer a lot of advantages over wood and composite decking, a rof you can walk on is just one of them.