If you have created a project with a script and scenes and wish to add all the text in the scenes as automatic voiceovers from the Storyboard editor:

Step 1: Click on the 🎙 Add Voiceover option below.

Step 2: Select the 🎙 (Add voiceover) icon and use the Automated text to speech option.

Step 3: Select an automated voice of your choice and Generate voiceover.

Step 4: Check the ☑ Add automated VO for all scenes option.

This will automatically generate and add an automated voiceover to all the scenes using the text inside each scene.