Good Morning @Reza,
I have built the flow that you outlined in your YouTube video: Power Automate Multi Level Approval Workflow | Serial Approval | Multiple Approvers. The change that I made was in the Approvers list. I used the dynamic content from the SharePoint list to assign the sequential approvers in the array.
The problem that I am having: When there are only two approvers needed and listed in the SharePoint Columns the flow fails because the array lists three dynamic approvers. A null value in the third approver stalls the flow and makes it fail at the last condition.
Ideally: If the last approver approves, and the next value is null then the flow would mark the SharePoint item approved.
Any suggestions would be amazing! Your flow is so elegant... I'm hoping that I can work it into our situation.
Thanks,
Shawnna

