Graphene is under an NDA so they cant be specific of that major OEM
with the confirmation of the Snapdragon 8 Elite Gen 5 being the SoC and Fairphone not being on the list
lets do some maths
first addressing the condition that phones have to be ones that are in the 8 Elite and above, let’s put it into GSMArena filter, choose by 8 Elite & 8 Elite Gen 5
Now we filter out companies that made custom SoCs to increase our odds (Basically we dont want to speculate if they would use their custom solution or Qualcomm), which is Samsung and Xiaomi
and the result is that we narrowed down to these 10 potential brands
At the end of the day when the Major OEM gives Graphene the okay to reveal it, this is when we will know who exactly it was