Tableau Mobile (or any of the products) doesn't support two-factor authentication but you may be able to use the following workarounds:
1. Enable SAML and use an external identity provider (IdP) that uses two-factor authentication. All user authentication is done outside of Tableau, regardless of whether one is using Active Directory or local authentication in Tableau Server to manage user accounts on Tableau Server. For more information about single sign-on with SAML, SAML requirements and configuring SAML, please see the following Tableau Server Online Help link.
2. Build a custom web portal with IdP integration and embed the desired Tableau view(s). Embedded views follow the same licensing and permission restrictions used on the server. Generally, people loading a webpage with an embedded view must also have an account on Tableau Server. For more information on embedding views into webpages, see the below link to our Tableau Server Product Help on the topic:
Embed Views into Webpages