Windows OneDrive folder and file properties

[meebers 0]

Hello

I use Windows 10 on the system this relates to.

All the files in the OneDrive folder has the green checkmark.

1.
Are the files with the green checkmark both in a local OneDrive folder and in the OneDrive online cloud?

2.
If I "Unlink this PC" - what happens to all the files with the green checkmark?
They are kept in the OneDrive online cloud?
They are deleted from the local OneDrive folder?

3.
If I download a file from OneDrive online browser then the files "Modified" date is being updated - bad
If I copy a file from the OneDrive folder in Windows to another local folder, then the "Modified" date is unchaged - good
I have only tried this on the same computer.
But what if there is 2 computers:
Computer 1 copy file A to the Windows OneDrive folder.
Computer 2 (another computer) copies file A from Windows OneDrive folder to another local folder - is the "Modified" date unchanged or updated?

I know the "Created" and "Accessed" dates are being updated / new when copying file A.

4.
Are the answers the same for Windows 11?

Thank you