Likely, since you didn't mention it, you don't want your gender to be an issue. That's not the world we live in. If you present as male and want to wear a skirt, the only possible option at bigger corporations is a kilt, but then you'll need to lean into being "Scottish". You might find more acceptance at a small business, even a smaller bank, perhaps, depending on where you are. If you present as female, then I don't know what to say, I've never heard of a job that requires trousers for women apart from for safety reasons.