Hi @nitishbijalwan,
Could you please share a screenshot of your flow's configuration?
Do you enable Content Approval option within versioning settings of your SharePoint list and add the "Set content approval status" action within your flow?
The issue is confirmed on my side, my flow's configuration as below:
Note: Enable the Content Approval option within my SharePoint list.
The flow fails as below:
But when I enable the Content Approval option within my SharePoint library, the flow works successfully. I have made a test on my side and please take a try with the following workaround:
The flow works successfully as below:
I afraid that the "Sent content approval status" action is not supported for SharePoint list, if you would like this feature to be added in Microsoft Flow, please submit an idea to Flow Ideas Forum:
https://powerusers.microsoft.com/t5/Flow-Ideas/idb-p/FlowIdeas
Best regards,
Kris