Just putting this out there. It may be way off because all the rest of your network is working fine, which it wouldn't be if this were the case: According to NOAA (the National Oceanographic and Atmospheric Administration, here in the US), and the UK space weather MET Office, there was a very powerful solar flare on Monday that was an X1.5 class flare, causing an R3 (very strong disruption) radio blackout in the US, Canada, and the Pacific Ocean. "Frequencies below 5 MHZ were most affected and navigation signals degraded."
In addition to two powerful flares like the one above, there have been multiple middle class flares over the last few days.
While these tend to affect lower frequencies, the shear strength and number of them MAY have had something to do with what has happened to you, if your problems began on Monday. Maybe the S23 is more sensitive to disruption from this kind of thing. Or, maybe just yours, for some reason. Manufacturing variability?
Like said above, just FYI. Or, it maybe a problem with your phone or router settings. I think the advice the guys gave is worth a try. Can you reflash the OS update somehow? Maybe there was an undetected error the first time.
