[itamarst]

I talk about this a bit in my book (https://codewithoutrules.com/saneworkweek/).

Basically, you want to demonstrate:

1. You can work independently.

2. Good communication skills.

Easiest way is, as dyeje says, get that first remote position at current job.

Lacking that, you can highlight both ability to work independently and communication skills in your resume and cover letter in a variety of ways. Previous remote work is easiest way, but there others. For example, "I contributed to open source project", "I worked with distributed team at work", "I taught this class", "I designed this project end-to-end", "I helped customers debug problems remotely", etc..

Make sure to call these things out explicitly near the top: readers won't necessarily see them if they're buried in third paragraph of second page.