The following are locks I think:
GK: Beach, Burgess, Circati, Bos, Metcalfe, Irankunda.
That leaves 5.
Of the 5, Souttar, Mo and O'Neill are locks if fully fit and ready to start. I have only listed them as question marks because of pre-tournament fitness issues (O'Neill and Souttar) and Mo's injury scare against Turkiye. I'll assume they are ready.
There has been talk of Ryan potentially coming back in, but I would stick with Beach. His ability with his feet will be even more valuable against the US and their press than it was against Turkiye. I also don't think it makes sense to drop him after what was probably the best goalkeeping performance ever by an Australian at a World Cup.
I think Irvine will (and should) start against the USA.
On the other two.
Italiano got through a mountain of work and was run ragged. Almost every Turkish attack went down his side for 90 minutes. The Turks were actively targeting him and avoided attacking down Bos's side. They'd done their homework.
Italiano mostly handled it pretty well - much better than he did in the two warm up games - but he was caught badly out of position a few times and Circati bailed him out. He played reasonably well but would have been exhausted. Geria made us much more defensively solid when he came on, so might be an option if Italiano is anything but 100% fresh.
Okon Engstler set up the goal which was amazing but both he and O'Neill were pretty ineffective on the ball for long periods. They were absolutely dominated in midfield. Despite this, I thought O'Neill got better and better as the game progressed and I have more faith in him keeping his spot. The assist aside, I think he was the better of the two.
My predicted lineup.
GK: Beach
RWB: Geria
CB: Circati, Souttar, Burgess
LWB: Bos
CM: Irvine, O'Neill
AM: Metcalfe, Irankunda
ST: Toure