To clarify something :-)
1. The flow you see in your Agent, is in power automate, they all are. I was simply pointing out that it would need to be set to (what you have it is), which for some connectors it's not supported, fortunately for that one it is.
2. I thought your ask was to write to THAT users (sharepoint/onedrive) which is different than everyone having access to the same location.
If you wanted to write it to a different location meaning
User A writes to user A location (in their own) and User B writes to user Bs location (in their own)
So there was some confusion so both things are true, I jsut thought you were asking something else.
Let's pretend you wanted to write to User A's for User's A's OneDrive/Document library, then you would use Get Profile V2 to get the user who triggered the Flow (which I know it says Agent Flow but it is completely a flow that you can go into the back end and look at), their MySite value and then dynamically write it to theirs.
For User B you would do that and dynamically write to their (User B) location.
It looks like you are simply writing to the same location for everyone but you want to make sure it writes it (Created By) the User who called the flow :-)
So it's just another Pivot on what I thought you wanted.
note: again not all connectors will allow this and will require you to do Delegation via Graph API :-)
Just not in this case.
Whew hehe so two great minds think alike just a little different hehe
Cheers!!!