As a fairly new skz fan, a year in, it's confusing that Han isn't collaborating with any fashion brands in any capacity. Especially when there are so many documented moments and anecdotes of him being extremely into fashion from debut days, him and I.N out of everyone else in the group. I.N working with a brand was inevitable. Hyunjin and Felix are extremely popular and they have the "conventionally attractive Asian" looks so it makes sense they would land these deals. Seungmin's was a complete surprise and came out of left field. It seems like the opportunity is there so I hope that if Han does want to involve himself more in the fashion industry, as he has mentioned before, he is able to and in the exact way that he wants be it as an ambassador or just as a show attendee.