Hi @PVLove
To create a link of SharePoint file, you can concatenate the SharePoint site and 'Path' property of Create file action. 'Path' property is the relative file path:

Output of Compose action will give the link for the newly created file in SharePoint library.
Next, part is to save this file path in SharePoint list, you can get the record using "Get items" action and pass the employee id or any unique field in the filter query. Iterate the items returned from "Get items" action using "Apply to each" action and within loop you can use "Update item" action to save the link for an employee or particular record.
If this helps & solves your problem, please remember to give a 👍 and accept my solution as it will help others in the future.
Thanks