@fikioshiiiii having a binder is something anyone can do regardless of gender identity. Some cosplayers have binders as well just to dress up. It is an article of clothing that anyone can get. Binders are something that aren't for everyone, but anyone could try them. So, yes, you can get a binder without fully knowing your identity or identifying as female, male, non binary or anything else! Just be sure that if you DO get one and wear it and like it, you follow the rules and keep it clean. Its all about what makes YOU feel good and comfortable.
I hope that helps some!