I think all children regardless of gender should be learning to look after themselves in their teen years but it's a bit horses for courses and is based on their interests.
For example my teens are interested in computers and the outdoors, they know how to search the internet to find the best prices for computer components and to check for discount vouchers etc. It's easy enough to apply the same to clothes and DS2 checked his drawer to see what size his t-shirts were and ordered the one he wanted in that size.
They know how to cook a meal on a camp stove and how to decide on which food to take on a trip depending on whether it needs refrigerated. They cook simpler food in the house but the theory is the same.
they know the importance of making sure your boots are waxed and that you stay need to stay dry etc
The can swim and know life saving techniques.
They know the value of money and buy stuff in shops. They can and do iron, they can do a load of washing and hang it out. They can run a hoover and fill and empty a dishwasher, mow a lawn, take the bins out, check the oil etc on a car, change a tyre on a car and a bike.
They have lots of skills that are transferrable. Yes I buy most of their clothes because I care more about their appearance than they do while they are under my roof. They do however have the skills to do so. I don't think they will be expecting any future partner to do it for them.
I am sure most teens can and do do stuff or themselves irrespective of whether they have an interest in fashion.