Does Discrete Wavelet Consider Sampling Frequency or Cutoff Frequency of Bandpass Filter?
THe DWT does not really know about the actual sampling. It do cares about the relative frequency span. And it has not knowledge about pre-processing, like linear filtering.
So in your case, the detail coefficients of the first level of wavelet coefficients correspond,  more or less, to the [128/2-128]/2 frequency range.
Because of the initial [0-30] low-pass filter, the above [32-64] first wavelet subband range is likely to contain little useful information.