In case you want to display the current post category and tags on your Post pages in the Divi theme please follow the following steps to get the desired result.
Create a new All Posts Template under the Divi / Theme Builder settings
Under the All Posts template click the Add Custom Body Layout
Add the Divi Text module to the newly created layout
Navigate to the Text module / Content tab and click the Dynamic Content option
You will be presented with a list of available Dynamic Content options. Click the Post Categories or Post Tags depending on your needs.
After selection, a new popup will appear where you can configure additional settings