Preview and Password functionality not working, I'm redirecting 2 another domain

My worpdress site is here – https://industrial.macraesbluebook.com/wp-admin/index.php

But I’m redirecting it to a folder on my own domain: https://www.macraesbluebook.com/industrial-marketing

I’m realizing because of this setup the draft preview isn’t working and nor is the page password protect functionality.

I’m not sure how to resolve this.

I’m also not a techie, so please discuss in a not technical way.

Thanks,
Lori