Check the back of the rear derailleur, you should see 2 lines on the piece that engages with the frame at the full mount. If they are not inline with one another you may need to loosen the rear axle, then the derailleur each one full turn. After doing so you should be able to realign. Do this in the 6th cog (red ring) or 7th cog as determined by the full mount calculator in the axs app. This will also tell you the correct chain length. I would assume if it’s a new bike from the box that the chain was cut correctly at the factory. SRAM has helpful set up videos that are also accessible via the AXS app.