Hello @Kummari, Rani ,
SharePoint 2010 workflow has been retired in 2020 for SharePoint Online. Although SharePoint Online still provides support for SharePoint 2013 workflow, it may be retired in the next 1-2 years.
Today you are not able to migrate exiting SharePoint 2010 workflows to newly created Office 365 tenant. After the final deadline set by Microsoft, you will not be able to migrate them to any Office 365 environment. Sooner or later It will be also impossible to migrate SharePoint 2013 workflows to Office 365.
We recommend customers move to Power Automate. You need Power Automate license to support its work.
You can refer to this article for more information about Microsoft Power Automate.
Thanks,
Echo Du
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