They are TMC2209 drivers, but no tuning values were set in the Klipper config. I ended up using GitHub - MRX8024/chopper-resonance-tuner: Registers calibration script for TMC drivers, which did cut down the noise a good bit. I was still getting bad VFAs at 2mm, especially on Y. I replaced the X idler with a toothed one, which seemed to help X. I swapped out the Y idler and Y motor pulley, but those didn’t help. I probably should try the Y belt next.