I have 2 dc, DS very nearly 16 and DD very nearly 13. I've largely bought all their clothes so far, and mostly chosen them. We live in a village, with no easy access to clothes shops for the dc. I get a lot of the DC's clothes online, mixed up with hand me downs, supermarket and charity shop clothes.
DS (16 in 3 weeks) has no interest in clothes, other than a preference for orange, camo trousers and hoodies. Other than that, he's not bothered what he wears. I have tried to get ds interested in choosing his clothes, but he'll just pick the first thing on the screen in his size.
DD(13 in 5 weeks), realised a few years ago that clothes don't have to be hand me downs, and loves nothing better than going to a shopping centre with a budget. She's asked for specific clothes for the birthday/christmas for the last year or two.
When I was DD's age, DM split the family allowance (now child benefit) between DSis and I and told us to buy our own clothes. But we didn't have school uniform, and lived in central London and were more than happy and confident to whizz round the shops on our school travelcards.
I want to give DD more independent with buying clothes. I want to make DS more independent with buying clothes. I don't think the solution is the same for both children - if I give DS an allowance, he'll just spend it on Switch games and peperami.
The both get "their age per fortnight" in pocket money, and their phone bills and any trips out paid for.