You can purchase them online and have the alignment aide printed on the ball for an additional $5 at Golfballs.com. There are a few options for the alignment aide. Check it out.....

Cause they haven't been updated yet. Still in the older box.

The AVX appeared midway in the Pro-V 2017 cycle and was not updated in the 2019 release with the Pro-V's. It was finally added to the 4-4-3 program in 2019. If the alignment markers are more than a quick passing fad then AVX may get a new update at the PGA show this year and then the alignment option. Part of that is also production numbers. The AVX balls and the yellow Pro-V's didn't get the custom number option, either.