It's very frustrating for the kids doing something on the computer to suddenly be kicked off the device (here being the computer), without being able to save their work in progress. This results in me having to disable the screen time for 5 minutes so they can go back and save whatever they are doing (or shutoff specific program).
One way to resolve this is to be able to specify when to show advanced warning notification to the end user that the screen time is about to end. The specified minutes can be either be from a predefined list, or can be manually entered. It would also be nice to allow me as a parent to specify a certain number of values (up to 3?). This way the kids can get something like 30 min/15min/5 min warning notifications before they are kicked off, giving them plenty of time to save/finish whatever they are doing.