Landing gear unsafe indication
Speculation: Normal approach, switched to tower, during config Landing Gear Down no green lights. So, requested to hold at 5 mile final(hold PPOS probably). Did troubleshooting, Landing Gear unsafe indication persisted, decided to continue approach(maybe they heard the Landing gear go down). Upon touchdown gear collapsed, so they went around, but damaged the engines, which caused dual engine flame out. Tower didn't seem That surprised because they were informed about the reason for holding, so they ask "confirm this time for belly landing".