Posting is quite reliable for me in Asia. Points and YTD Spend appear late afternoon the day after check out on the app. Account Activity is updated a few hours later and the nights updated overnight. All these data points are updated at the same time late afternoon on the web site.

This happens ~90% of the time. If it doesn't then I know something is wrong and I will reach out to the hotel directly to try to get it posted. Sometimes they can do this, sometimes they cannot for unfathomable reasons. After ten days I will email research@ with the folio and they are good at fixing it.

Aside from Design Hotels that post stays using a manual process through a dedicated portal, I don't know if the hotels have to do anything before a stay posts or if it's automatic. But whatever the process is, it seems to take place overnight in the US the day I check out - hence afternoon the day after in Asia.