Ask HN? Why are there so few remote product manager's job?

In my last 30+ day of job searching, I have hardly found any job posted for a remote product manager position.

To get a remote Product Manager's job, I created a personal portfolio site: https://goo.gl/omNWsJ. I also created a simple SaaS application to demonstrate my coding, design, and product management ability: https://goo.gl/55eTZx

How do I find a remote IT product manager's job?