hi, i've just re-read it properly and i think that a lot of your paragraphs are well structured and despite not necessarily strictly adhering to a peeal structure, i agree with one of the first comments that you would achieve marks in the top band as there is a good amount of ao1 content and ao3. Essay structures and preferences are honestly subjective and i appreciate that not everyone likes to adhere to a structure, but i think it can be good to loosely adhere to a structure to ensure your answer remains focused and that you're hitting the marks. I think also using a peeal structure can help in your revision. Your essay was good though, so don't sweat too much

i'm going to re-write your second to last paragraph with a peeal structure, as i felt it lacked depth within the explanation and got a bit distracted. While you had two very good evaluative points in this paragraph, it seems you kind of forgot to explain in depth what your point was. This paragraph mar look like this:
Point: One strength of the theory of localisation is that it uses brain scans to provide research support, such as fmri scans*.
Example: For example, peterson et al. Conducted fmri scans on a group of volunteers and found that during tasks that required reading, broca's area displayed increased neural activity and during listening activities, wernicke's area displayed an increase in neural activity.
Explanation: This provides evidence for the theory of localisation of function because different parts of the brain e.g wernicke and broca's area displayed an increase in neural activity in response to specific tasks, as indicated by an increased movement of blood to these areas as shown by the fmri scans, so that these areas may be largely responsible for the production of certain behaviours and abilities such as language production and comprehension.
Evaluation: The use of brain scans, such as fmri scans, to provide research support for the localisation of brain function is positive because they are objective and done in highly controlled settings - for example, distractions can be limited and conditions and tasks/ stimuli can be standardised and repeated across experimental groups, in order to increase the internal validity of the results obtained. This means that researchers can draw valid and accurate conclusions regarding localisation of function within the brain. (you could also talk about the benefits of fmri scans etc. As opposed to post mortem examinations previously used - e.g. Greater temporal resolution so you can see changes in neural activity in real time instead of examining dead brain tissue and assuming that any potential damage caused the aphasia when the person was alive, because researchers can't validly assume this because they can't go back in time and assess the person as they're dead...)
you could also counterpoint this evaluation: However, increased neural activity doesn't always equate to the area being entirely responsible for the function, and the brain works in an interconnected fashion (something like that, similar to what you said, leading on nicely to your next paragraph)
link: Therefore, localisation of function does have research support, e.g. Brain scans, to provide evidence and support for this theory.
Your next paragraph could then be about the study conducted by lacey as well. You could also mention functional recovery and neuroplasticity, so that when one area becomes damaged, other areas of the brain can actually take over this function so that it is not lost, indicating that localisation of function may not be entirely accurate as different regions of the brain can work together to perform the same function or take over from damaged areas entirely.
Next paragraph would be about gender differences.
I genuinelu don't remember what the 'a' within peeal stands for, in my first comment. I think i meant 'counterpoint' - it's basically an evaluation within an evaluation, where you're evaluating what you just said. E.g. Brain scan good, but fmri have lower spatial resolution than post mortem and sometimes increased blood flow doesn't actually mean the area is responsible for the function

honestly, this is a really strange essay question and i haven't seen it before so i can't really direct you with what to write. Whenever you're unsure, i'd absolutely recommend looking at the mark scheme to see where you would've gotten marks. The peel structure honestly just feels like yapping a lot. I will submit an essay on a topic i'm more comfortable writing about soon, so that you can see what a model essay would look like

*i'm assuming fmri scans were used.