Banding numeric data in lightgbm

Question

I have a model created using LGBMRegressor where I have some numeric data type features (ints and floats). I then export to PMML. My input data for when using the PMML however is banded. E.g length can be 0-10, 11-20, etc. Is there a way to have numerical bandings in my lightGBM model and PMML? I could round to the minimum of the band before I do my model, so that my model will split at say 21, but my PMML needs to be of the form such that 0-10, 11-20 are equivalent to <21 whilst 21-30, 31-40 are equivalent to >21. All I can think is to set them as categoric variables instead but this doesn’t seem the correct approach