Hi @Shash,
Could you please share a screenshot of your flow's configuration?
Do you want to filter items of your SharePoint list with the OData query in Filter Query field of "Get items" action?
I have made a test on my side and please take a try with the following workaround:
Within Filter Query field of "Get items" action, type the following formula:
DueDate gt 'utcNow(...)'
The utcNow(...) is a WDL expression, which is wrapped with single quotes. Within right panel, select Expression tab, type the following formula:
utcNow('yyyy-MM-dd')
The flow works successfully as below:
In addition, on my side, the DueDate is a Date and Time type column and the Date and Time format is Date only:
If the Date and Time format of your DueDate column is Date & Time, please take a try with the following workaround:
More details about the WDL expression in Microsoft Flow, please check the following article:
https://docs.microsoft.com/en-us/azure/logic-apps/logic-apps-workflow-definition-language
Best regards,
Kris