sauravshanbhogueYes it supports & so i have to edit my reply. I was wrong somewhere with my reading & understandings.
It seems that you misunderstood his question. He wants to know if the ROG 3 30W charger is compatible and if yes safe to use for his ROG 2.
AmitGardeIf you don’t have ROG Phone 2 and don’t know about it, please don’t mislead others!
His reply states that ROG 2 doesnt support 30W hypercharging so basically ROG 3 charger is not fully compatible with ROG 2 & so ROG 2 cannot be hyper charged like ROG 3 & even if he buys 30W charger of ROG 3 device will limit it to charge only at 18W Fast charge.