A guy flashed A11 .138 raw from A10 initial version and updated to .158 manually , and got update for .172 after a day or two of release
So may be try flashing raw !!
Asus officially announced rog phone 3 will get android 12 update in H1 2022, ₹_₹ source me ~ AVS ಠ∀ಠ
For real though gsm arena and gizmo china also confirmed.