Are you using Adobe Experience Manager as a Cloud Service environment ?. Please check as I believe that is the reason for you not able to see Quick Site Creation feature.
Please check if you have latest Cloud SDK. I tested using SDK Version "AEM SDK v2021.11.6023.20211111T113531Z-211000" published on 2021-11-19 and I am able to see Quick site creation feature.
Experience Manager as a Cloud Service follows a monthly release cadence. As a result, new features are available as continuous updates to Experience Manager every month.
@Bhuwan_BThanks for your input, you can see I'm using the AEM SDK v2021.11.6023.20211111T113531Z-211000. But I really can't see the Quick site creation feature. Is there any other configuration/settings needs to do?