Hi,
Late to the thread, but just to give some insight, there are multiple CCTV cameras located as Karachi airport that are placed at the stands, it is possible that one of them has the runway in the background and may have captured the first approach. However, the footage is confidential and most probably won't be released.
I myself am a cadet based in Pakistan, and we see frequent violation of SOPs, both at GA level and at airline level. However it still baffles me that they decided to continue without gear down. I've always discussed that there still isn't any actual footage that confirms that they were gear up when approaching. Thus, is it possible they raised the gear prematurely after the go around 10-20 feet AGL, and the aircraft sinked due to TOGA activating a few seconds later? Karachi weather was hot and humid at the time, with very low air pressure. If someone has hypothesized this before, I'm sorry must've missed it.