 
   
   
 For the NMC Battery it seems to be around 1% every 10k km. It's what I have experienced and if you watch reviews from other drivers it matches quite well with their SOH.LFP SE - Sept 22 model - from car scanner (but verified at service each year via UKMG) - no issues todate (aside from minor reduction in power @ <20% SOC at 70mph+)
... at this rate, the MG4 might see me out

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Mine (same model/year as yours) is 99.2% at like 8500km so about the same as yoursMine has 99% at 10k km - 2023 Luxury (64kwh) Facelift (with rear wiper)