Service had resumed to Palm Springs after the April 2021 incident and has for a while. Don't know if there has been another incident, but it was closed for months after the April 2021 incident . Don't know what, if anything, UP and Amtrak did to remediate the situation. It is showing as an active station (which it wasn't while the stop was suspended) and is bookable for tomorrows departure from New Orleans, although only in a room. It isn't blocked/sold out, which generally means they are intending to stop there. It isn't on the Amtrak Twitter feed. Of course, only those booked would get a text alert, the rest of us can only look at the generally published info, and that is showing everything appears ok.
In any case, if there is a known problem on the station track, they will suspend the stop but the train will get through. If you aren't getting off at PSN, don't worry about it. UP will keep the Sunset Route mainlines clear for their own reasons. It isn't exactly light on freight traffic.
PS, the derailment in April 2021 was at least partly cause by the train backing up into blown sand. A sleeper car is much lighter than an engine and a lot easier to get derailed if the tracks are covered in sand. Apparently there was an issue with the east switch from the station siding and they had to back up to get out.