Create the two Shortcuts on your Mac
Open the Shortcuts app and create a new shortcut. Name it exactly Enable Do Not Disturb. Add the Set Focus action, choose Do Not Disturb, and set it to turn On until Turned Off.
Create a second shortcut named Disable Do Not Disturb with the same action, this time turning Do Not Disturb Off. Run each one once from Shortcuts to confirm they toggle the Focus.
Any names work, as long as they match what you type into Ikuna. Short, unique names are easier to keep straight.