This isn't a question but rather a solution to a problem I couldn't find anywhere online, apologies if this is the wrong community.

If you have a Lenovo laptop (in my case a T14 thinkpad) and your display dims after about 30 seconds, no matter what you specify in Windows settings, you might have to disable the "Zero-Touch-Lock". You can do this in the Lenovo Vantage Software (in my case called "Lenovo Commercial Vantage") in the menu "Smart Assist".