Perlite: Ph impact?

I put a 2” layer of super chunky #4 perlite at the bottom of my pots for drainage and aeration. Could that layer of perlite at the bottom Impact my soil PH late in the grow when roots are packing around the perlite chunks at the bottom of the pot late in the grow? I dont have any major issues but dont see anyone adding Extra drainage material for soil grows.
 
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