Approve multiple documents

I have faced a scenario that if my user wants to send multiple documents for approval in the SharePoint library which I created. Since it cannot select multiple documents and start the power automate. 

1. I tried creating the folder, put 2 documents on it, and used the "For selected file" as a trigger. The result is it won't work because it cannot found the file inside.

2. I tried by adding the file input, it appeared that I can get only file name but for the content it cannot.

Is there has anyone who acheive this scenario? or this is the limitation that we need to select only the single file for approval?