TY Basj for your reply.
Yes, I have Start11 V2.5, but under Start Menu > Configuration, I don't have any "Advanced" option. Only this:

Also, my problem is that even increasing the shortcuts listed (e.g. to 15) I contunue to see only 4 Icons pinned, no matter if I ask to PIN an App in the Start Menu....
Concerning the OneDrive Quick Access, Shortcut please check also this Screenshot:

Any other hint or suggestion, please?
Thank you in advance!