Currently all SPX options (SPXW) are PM settled, except for ones that expire on the third Friday of the month. Here both AM and PM settled are offered.
The CBOE now plans to list weekly SPX AM settled options starting in early November.
Guessing it will create some confusion depending on how your broker lists these.
Link to CBOE memo,
[Cboe Options to List S&P 500 AM-Settled Expiring Weekly Options](https://www.cboe.com/notices/content/?id=61537)