I think only through official update release to your mobile

I had same problem with my j6 but it was resolved after updating one ui 4.But I'm not see a9 in the update list of ui 4 and ui 4.1.https://www.sammobile.com/news/list-galaxy-devices-eligible-for-one-ui-4-0-android-12-update/https://www.sammobile.com/...

Yes It maybe end of Dec 22, or early 23