It's looking like the trailer camera options for the 2023 are really limited at this time. They weren't accepting orders with the 360 Trailer Surround View (XN1), and now it appears that any orders with the Tow Mode Camera (XH7) are getting that option removed. Hopefully these limitations are due to parts availability, and these options can be added later as camera systems become available.
Not wanting to go the aftermarket route for trailer cameras, I did some looking into the existing 2022 trailer camera systems. I did find documentation from Stellantis CVBU (Commercial Vehicle Business Unit) that, "The 2022 and 2023 XH7 trailer camera kits are NOT interchangeable. The 2022 kit will not work with a 2023 truck, and the 2023 kit will not work with a 2022 truck." However, I did not find any similar warning regarding the XN1 360 Trailer Surround View. Not knowing if it will work, but not finding anything saying it won't, I went ahead and bought a 2nd hand XN1 360 Trailer Surround View system. When I get my truck I'll try this out and report the results (unless someone else beats me to it).