If you want to create a high-quality website that will support IDN on WordPress, you can contact prosvit.design specialists. I am sure that they will be able to do whatever you ask. I've often asked them to create some separate elements on my site. Of course, I also ordered the creation of my other websites from them. I'm completely ignorant of complex software for creating websites, domains and platforms like WordPress. Therefore, I'd rather turn to professional designers and developers right away than try to make websites myself. WordPress hosting supports IDN, so there will be no problems. Good luck.