In mishnah Torah the rambam clearly understands chukim as laws without a revealed reason
Something similar that I wrote recently in another thread:
“Interesting example of the different styles: In the Moreh the Rambam explains that shiluach hakan is because of tzar baalei chayim.
In Mishneh Torah (Tefilla) he writes that this reasoning is ridiculous, as it is obviously a gzeiras hakosuv that can’t be understood.”
Another example from Mishneh Torah (end of Sefer Tahara):
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