See Flows on a list in Site Settings, and stop Flows from changing Modified By
Currently any Flows that change metadata fields on a document will also change the Modified By to the person who created the Flow.
This wasn't the case with SharePoint Designer workflows, and goes against all of my business uses. flows are built to work seamlessly in the background, without interrupting other business needs.
If the concern is in seeing who has created Flows, or knowing which Flows have been created for a library/list, then there should be some other way to document this, as was previously the case with Designer Workflows, where you could see the workflows for a specific list in the site settings.