Thanks for letting us know about your experience while using your Samsung Galaxy S23 Ultra having issues with the missing super-fast charging features. And I am hoping with the replies by our dear Samsung members here, we were able to satisfy your query.
If that doesn't fix the problem, you may submit an error report through the Samsung Members app as follows:
Step 1. Long press Samsung Members icon on Apps screen and tap Error reports.
Step 2. Tap OK on agreement popup to send system log data.
Step 3. Select Symptom category "Power/Battery/Charging".
Step 4. Describe the problem in details and SEND.
Should you need further assistance and guidance, you may contact us via our online Samsung Customer Care support channels below.