how do I set the ringer volume to 100% using shortcut

Hello there,

You can create a shortcut using the steps in the "Create a new shortcut" part of this link: Create a custom shortcut on iPhone or iPad

It’s easy to create a new, custom shortcut using the Shortcuts app for iPhone or iPad:

• Step 1: Create a new shortcut in your shortcuts collection.

• Step 2: Add actions in the shortcut editor.

• Step 3: Run your new shortcut to test it.

You can also find some good information about adjusting and managing iPhone volume here: Adjust the volume on iPhone

Take care!