One or the other day, we end up with the following scenario.
“The Approval Workflow is Missing!”
I opened the list & list settings, tried to add a workflow & I cannot see the Approval workflow.
How to fix it?
The Approval workflow is part of Workflows feature. You need to activate the feature in the Site Collection level.
Open Site Settings Page.
Choose the Site Collection features link & in the appearing page, scroll down to the end.
Activate the Workflows feature as shown above.
Wait for a few seconds & Return to your List > List Settings > Add a workflow page.
You can see the Approval – SharePoint 2010 workflow is back!