Imagine an alligator. Quite good at catching prey with their current anatomy.

An alligator that shoots laser beams for tracking and bullets would be even better. There’s however no path from their current anatomy to this state, regardless of the randomness and timescale for mutations. In fact, in order to achieve this higher state several non advantageous intermediates would be necessary and therefore never selected for.

So no, evolution can’t achieve global maxima, it can however optimize the shit out of what it’s given to work with.