I have read a few articles stating that for most norwood 7 men they would display that pattern by the time they reach 26. Would you have a reference picture of what that would look like? Im assuming they generally would not be fully bald by that age.
Two scenarios point to a Class 7 pattern of balding.
1- The aggressive balding pattern fully appears by the age of 26-
2- The balding pattern is evident with thinning and miniaturization down to the rim of permanent hair around the top and back of your head which suggests that your pattern will eventually become a Class 7 pattern.
You need a good doctor to manage your balding and if you want a hair transplant, to help you get realistic expectations for what you can achieve as determined by your donor density and your hair bulk.