Want to Automate Uploading of csv Files (RPA)

I would like to automatically upload csv files by automatically operating the software called "GRC" in the search ranking check tool.

I used python's pyautogui and pywinauto libraries.I'd like to register this with the Task Scheduler and do it regularly during the night.

If the PC screen is open, it works fine, but if the screen is not open, it doesn't work well.
I think it's because both libraries need to recognize the screen.

If you want to keep your PC running all day, you can do it in the above way, but it's not realistic.

Is there any other way to automate the above behavior even if the PC is not started?
If python is not possible, other methods are fine.

Thank you for your cooperation.

(Additional)
I tried putting the Windows operating system in the Amazon Work Spaces (AWS) virtual desktop service, but it didn't work well unless AWS was also open.