Sorry to hear that, JohnBrian, about your Samsung Galaxy S20+ having issues with display and overheating battery but can't find resources to proceed.
You can submit an error report through 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 for sending system log data.
Step 3. Select Symptom category "Display" & "Power/Battery/Charging".
Step 4. Describe the problems in details and SEND.
For more assistance, you may contact us on our online Samsung support channels below.