I'm trying to set up a document approval workflow as well as a signature collection workflow in our Office 365 (E3) sharepoint. However, there are only 2 workflows available to choose from (see attached image)
If you go to Site Settings > Site collection features (under Site Collection Administration header) could you check if you have following feature available: Workflows and if it's not enabled, enable it. Checked on my O365 account and it worked :)
I also had to activate the site-level 'Team Collaboration Lists' feature, before the Workflow Settings option would appear for lists/libraries. I think it has something to do with the need for the Tasks list.