If for any reason the thrust levers are not properly set, the PF would notice immediately that something is wrong on the FMA, because he would still see the normal modes that guide the aircraft in the landing phase.
Reading the FMA could have been missed. A Jetstar Australia A320 almost contacted the runway during a go-around when the thrust levers weren't fully advanced into the TOGA detent. However this was during thick fog so it's reasonable to assume that the autopilot was engaged.
https://australianaviation.com.au/20...around-mishap/
If they were at 3500' and 5nm, based on normal approach speeds they were around 2 minutes from touchdown and would have needed a descent rate of around 1700 fpm which is double what would normally be expected and well outside stabilised criteria. The gymnastics involved in trying to salvage the situation would suggest that the aircraft would have been hand flown at the time. Clearly, a safe landing wasn't possible but the go-around might have only been initiated after a prolonged float down the runway, it would be interesting to see how far along the pavement ground contact occurred. An early gear retraction before confirming "positive climb" and possible non engagement of TOGA when go-around was initiated look increasing likely.