Just wanted to add my experience to this.
I took the plunge today and did a clean flash of v4.5.0.18 on Xperia 10 ii running Android 12 and I can confirm that everything is working as expected including GPS.
One question I do have is regarding performance. I’ve not installed Android app support so I’m running pure Sailfish OS but compared to the XA2 it doesn’t feel any snappier. Is this to be expected or is it that because I’m running on top of Android 12, the performance is being hindered somehow?