Hmm. Well, let me see.
In the administrative panel provided by my host (i am not self hosted per se) I have the option to create subdomains of my domain. It’s an automatic “create subdomain – enter name .domain.com” kind of thing so there’s not much I can say about it. Host is Dreamhost if that means anything.
I have WordPress configured with the location being the domain.com/inhere and the WordPress address being https://inhere.domain.com. I tried it with both being domain.com/inhere as well as https://inhere.domain.com but it yielded the same results.