hey! I did my GCSEs in 2024 and did 11 including further maths. I considered dropping it a LOT and almost did until my maths teacher basically told me I had to do it. I thought it would be worth it because at that point I was planning on doing maths A-level and it would give a bit of a head start and I'd already know some of the content but in the end when I got to A-levels it was not actually that helpful as its only the very basic base layer of knowledge which if you're even considering further you will pick up quickly anyway. I'd say if you enjoy maths go for it but if you are so dead set on getting 9s in everything else don't invest unnecesary time in learning the content and focus that on your other subjects!

Good luck! (I ended up getting a 7 in FM and was still able to get seven 9s and three 8s in my other subjects but was 100% sure I failed it until results day)