Explanation:
Box 1: Apply to each
You can use the Apply to each action to process a list of items periodically.
Box 2: Do until
The Do Until control in Power Automate is a loop that repeatedly forces an action until a certain condition becomes true.
Reference: https://docs.microsoft.com/en-us/power-automate/apply-to-each
https://blog.enterprisedna.co/do-until-loop-control-in-power-automate/