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Once information is in public domain you can't really make it unavailable. Buying a house is enough of a shitshow here that to hide details of any comparable properties would be... unhelpful.
It doesn't bother me that the place I sold last year is available, nor that the place I finally bought last week is still available to see. Tbh as they're both South London houses you could guess the floorplan just by looking at the front of the house.
Zoopla, Rightmove, plenty of others. They'll also track the change in asking values, when they went under offer, exchanged (if they can find that out) etc.