If you’re wondering where the rest of the keys are, they are accessible by holding various keys rather than tapping them. Shift is Shift when tapped held, but becomes Enter when tapped. [jefmer] wrote out their entire project description on the thing in order to break in the Gherkin.
This is a companion discussion topic for the original entry at https://hackaday.com/2024/03/25/keebin-with-kristina-the-one-with-the-pickle-pi/