It sounds like you have a subscription to the myFICO Ultimate credit monitoring service (CMS). This is just one CMS of many (Credit Check Total, CreditWorks Premium, etc.) but they all have some things in common. One thing is that they provide a front-end summary page which gives you a high level view of your reports. Another is that they provide you with scores, which are generated by an algorithm on the back end.
The key thing is that the front end summary page is not made by the same people as the back end scoring algorithm. Even at myFICO -- the front end summary page gives you no reliable insight into how the back end FICO algorithm is working. I know that's a big surprise, but it is true.
This is never truer when it comes to whether a person's AU accounts are being counted by the scoring algorithm.
So basically you have to ignore what the summary page says or doesn't say when it comes to your AU accounts. You may decide that the myFICO CMS therefore isn't worth paying all that money for, which is fine -- lots of people come to that decision. You can get your reports for free and your FICO 8 scores for almost free, so it's ok if you decide to cancel your Ultimate subscription.
Your decision to keep the utilization very low on your AU card is a great idea. When the card in your name begins to appear you should keep its utilization very low too. Once your own card has appeared on your reports, we can give you a simple test that will answer definitively whether FICO 8 is counting that AU card.