Here is a CNET article (linked below) from this afternoon that states that the S23 Ultra has it:
"Samsung didn't include the capability to connect over satellite in the new Galaxy S23 series even though it packs the two big components needed for Snapdragon Satellite: the Snapdragon 8 Gen 2 chipset and the Snapdragon X70 5G modem. Since Qualcomm's feature requires phones to be designed with Snapdragon Satellite in mind, it seems like Samsung passed on building the feature into its S23 phones from the ground up.
When CNET Senior Editor Lisa Eadicicco asked T.M. Roh, Samsung president and head of mobile experience business, why the S23 series didn't include satellite texting, he explained that its functionality is too limited to include in this round of Galaxy phones.
"When there is the right timing, infrastructure and the technology [is] ready, then of course for Samsung Galaxy, for our mobile division, we would also actively consider adopting this feature as well," Roh told CNET through an interpreter. "
https://www.cnet.com/tech/mobile/samsung-s23-will-miss-out-on-2023s-biggest-phone-trend/#:~:text=Samsung%20didn't%20include%20the,the%20Snapdragon%20X70%205G%20modem.
I sure hope it's the X70 modem! We should have definitive proof soon, likely before the pre-orders ever ship.