UK passport renewal needs "photo code", what businesses in the USA (PNW specifically) can provide these codes?

https://www.gov.uk/photos-for-passports

Get a photo with a code from a photo booth or shop

Before starting your application, get a digital passport photo from a photo booth or shop. Choose the option to get a code with your photos.

You’ll be asked to enter the photo code during your passport application and your digital photo will be added to your application.