@Anonymous :
I should have looked more closely at your Flow - sorry.....
Your issue is that you have approvals inside of your loop. The Flow will pause on each approval until a response is received from the approval causing the timeout.
You'll need to redesign your Flow to have your Approvals outside of the loop. Maybe you can set variables and reference the variables in subsequent actions.
Also, why do you have 3 successive approval actions?
Scott