Option for %complete of a task to change based on items completed in a checklist

Hi,

I want the %complete of a task to change based on items completed in a checklist. Currently it uses a combination of hours and the start/end date, but I would like the %complete to also reflect the number of items that are completed in a checklist. For example, if a checklist of 8 items has 2 items done, the percent complete would be 25%. Is this possible? Or could this feature be added. I know there is a work around to use power automate, however, I encountered issues with pulling planner premium tasks into power automate. 

Thanks