Yes, We can set up 2FA on Splunk cloud.
To setup Duo security 2FA in Splunk cloud need to follow the below steps:
1. Go to the settings on your Splunk cloud host.
2. Go inside Access controls under the section of USERS AND AUTHENTICATION.
3. Click on the Authentication method.
4. Select Duo security under Multifactor Authentication
5. After selecting Duo security to configure 2FA need to fill the configuration detail from your Duo Splunk Application information.