: What Android version are you currently on? Did you purchase the phone online, or outside your current region, as this can affect your ability to get updates?
All I can suggest is the official channels: Go to Settings > Biometrics and Security > Other Security Settings > Security Policy Updates > Update Now (WiFi required). For Android updates go to Settings > Software Updates > Download Updates manually
Alternatively you can look for updates on Smart Switch on your home computer: https://www.samsung.com/us/support/owners/app/smart-switch
Once installed, connect your phone via USB cable and look for an update prompt on the Home Screen, next to your device details.