Thank you.
Can you type "screensaver" in the search on the taskbar to launch Screen Saver Settings (a legacy control panel looking item). Here, please make sure you don't have the 1 minute wait enabled. If so, screen your screen saver drop down to none and save that settings.
Additionally, some monitor has built in power management settings too. That will require you to go into the monitor's local menu on the monitor's side to see if it is the case. If you cannot find it or if you have a different monitor, such as a TV, you can hook it up to the TV to see if it still happens. That can help us narrow down our troubleshooting process.
If all of the above don't yield any improvement, consider a clean boot. You can use this instruction: https://support.microsoft.com/en-us/topic/how-t...
See if it happens with clean boot, if not, then it will be coming from third party apps.