It varies by tour and guitarist.

I’m not aware of a single “most common” pedalboard layout for Julia Jacklin’s touring guitarist. She’s had different guitarists over the years (e.g., Lewis Coleman, among others), and they don’t tend to post detailed pedalboard shots online like some artists do.

From live videos and recordings, her guitar sound leans clean, with subtle overdrive, reverb, and occasional tremolo or fuzz. So a typical indie-rock board with a tuner, a low-gain overdrive (like a Blues Driver or Tube Screamer), a reverb (maybe a Strymon or Boss), and a delay would get you close. But there’s no sacred, documented layout to copy.

If you’re chasing her tone, focus on amp reverb and a light overdrive rather than hunting down a specific pedalboard list.