The time period we are talking about lasts only 55 seconds.
521 came on to the Tower frequency 13 seconds after tape started. (as shown on video)
At start + 14 Twr acknowledges.....plan to vacate at M9
At start + 20 521 acks
At start + 26 Twr clears aircraft to land
At start + 32 521 acks
At start + 35 565 checks in with Twr at 6 miles
At start + 38 Twr acks...plan to vacate at M9
At start + 42 565 acks
At start + 46 Twr tells 521 continue straight climb to 4000 feet
At start + 48 521 acks
At start + 1 min 08 secs Twr tells 565 to go around
The crash landing is underway by now. The transmissions can be clearly heard and match the sub-titles. The only time in which 521 might have made a go around call
would have been in the gap between the end of 565's ack at + 42 and Twr's climb call to 521 at + 46. 2 to 3 seconds at most. There was no such call nor any indication of simultaneous transmissions. One conclusion must be that Twr saw some reason not to continue to land and wasted no words or time in telling aircraft to climb away.