It depends how u use ur extra time, is it more of writing slow or understanding the question? For me I have extra time and i spend way more time tryna understand the question before i do it, i think practising past papers and how they word questions is rlly useful as the question itself can be really simple but they like to reword it to make it difficult
If its writing slow try to think before u write ik it sounds rlly obvious but like make a plan in ur head or on paper it rlly helps especially for essays.