It can - but, with diversity, a 45A circuit can supply about 127A (about 29 kW at 230V) of cooking loads - which is perhaps a bit OTT in a domestic environment. Provided you believe in diversity, a 32A cooker circuit should be more than enough for any domestic cooker circuit.
Ah! - I suppose I should have realised that (but just a little quoting can sometimes help dimwits like me
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