I feel this is my moment to assist!
I breezed through my GCSEs with nothing lower than an A, having taken extra language GCSEs being a language specialist school.
At A-Level, having spoken to the Head of Sixth Form for advice (a business studies teacher....) I took: Product Design; French; Statistical Maths; and Chemistry, as I wanted to be a design engineer. Looking back - I was a 16 year old with gumption!
I, like your daughter, am naturally good at maths (my dad is an accountant and my brother naturally gifted!) BUT it took me REALLY putting the work in at home to get to an A*.
For me personally, I could have perhaps coped better without adding French to the mix, a different but similar scenario to your daughter.
I was badly advised to throw in French as "a French speaking engineer would be top pick for jobs" however EVERY language teacher after the fact told me that was awful advice.... and we had many of them given our school specialism....
In the end, my dad had a sudden triple heart bypass just before my first year exams and while doing OK overall, I mentally couldn't absorb what I needed to, and on subjects that didn't naturally "come to me" I couldn't wing it. Having worked really hard at them all the entire year, I got uncharacteristic C's - not enough for a good uni and my future aspirations.
I re-sat the entire year with different subjects (cried my eyes out, my life was over) as I realised that I naturally find humanities/English a doddle without trying and so why wasn't I focusing on what I'm good at. It also meant I "career proofed" myself because life can throw you in a spin and you can't always give 110% to something.
My next focus (as the username alludes) was to become a lawyer as a career in something I'd have to mentally challenge myself to do every day seemed silly.
I took: History, psychology and English language. I got excellent grades, went on to do a law degree (so not dissimilar to history) and got a 1st. I then had my pick of training contracts as a result and have had a successful career to date. My ALevels have helped with that as firms do look at those - so depending on where she wants to be - doing well is important.
You wouldn't ask a fish to run, so get your daughter to shine at what she's naturally good at - ditch the maths! Maybe try something a lot easier but to give her a taste of something different like IT, business etc? ☺️