flows created on the default environment is displayed when you select a file from your SharePoint library. Flows created in other environments would not be displayed from the SharePoint library when a file is selected.

[Bisbond]

Only  flows created on the default environment are displayed when you select a file from your SharePoint library. Flows created in other environments like production or Sandbox is not displayed from the SharePoint library when a file is selected.

[ashmon07]

This feature will be very helpful for our end users.