INA821: Slew rate vs Large Signal Frequency Response

Hi Team,

The IC has according to the datasheet a slewrate of 2V/µs when G=1 and Vo=±10V at Vsup=±15V.

Now I see figure 40 where the output has a Vp of 10V at 15kHz.

I would expect  a frequency of f=SR/(2piVp)=31.8kHz

Can you tell me what I am missing here ?

Best regards

Simon