Uploading Word Project Assignments from a Mobile Device Using Copilot 365 & OneDrive

My Question is: now that Microsoft is using Microsoft 365 and they are recommending using Copilot 365 for Mobile devices - when you create a Word document it automatically saves to the OneDrive. Is there a way to access the OneDrive from a Project assignment submission screen on a mobile device? Or does the actual file need to be saved to the mobile device and then uploaded? I am just trying to save the having back and forth between apps, but I am not seeing the option of uploading from OneDrive on a mobile device.

When you click Upload it provides 3 options (Photo library, Take Photo/Video, or Choose Files) and Choose Files brings files saved on your device not from OneDrive. Then the other option of Choose Existing gives 5 options but none are OneDrive they are (My Locker, Group Locker, ePortfolio, Video Note Search, & Google Drive).

I have screenshots to provide what I mean. I am just trying to find the easiest path if a student would need to use their mobile device to upload from Copilot 365 and then get it easily uploaded? Any help or suggestions is appreciated. Thank you!