@TTex600 - with you.
OK, so if I've got this right that ECAM message relates to the failure of the anti-ice system on the pitot tube rather than the pitot tube itself. Being an internal systems failure it can be easily determined which of the three, or which combination of the three have failed.
A blocked pitot tube scenario involves a failure from outside the system, so it cannot reliably monitor where the failure is. Having the ECAM suggest or instruct UAS procedure might be technically feasible, but I'd be inclined to worry about edge cases, such as a false indication scenario or a point in the flightpath where a strict interpretation of UAS procedure might be inadvisable.