if I'm not mistaken the top shot is the current tank, and the bottom closeups are from a prior time?
both are zero ammonia condition due to opened corals, I can't zoom in on that smaller full tank pic but I see an open anem on the left, they'll close tight with true burning free ammonia present/no current ammonia issue is at hand if that's the most recent pic.
we'd have to know where a strong source of ammo
Even people who disagree about base cycling specifics can agree the hallmark of a completed cycle is the ability to manage ammonia from compounding daily. Further proof you don't have an ammonia issue is in the fact you don't have any room left to be compounding

if the 8ppm was real, your lady w boot you due to home stench/ the real level is zero ammonia and every day would add more and the water would be cloudy, with lost animals days ago.
this is another reason why claimed .25 ammonia systems don't hold up...that number has to be compounding daily to be real, not just holding. Holding means the bac are there...
Whether or not there was an ammonia event upon setup of this tank has to come from detritus moved over, if any. Looks too clean to have been a messy tank transfer, all cloudy from pent up waste put back into suspension (and stink)
I bet it was a no ammonia event the whole time, its a testing confound somehow