Transfer all domains registered with Netlify to another registrar (DNSimple)

Hi, I would like to know how can I transfer all the domains I registered via Netlify to another registrar, DNSimple.

I noticed there’s a small guideline at the end of the domain’s page on Netlify dashboard. It’s advising to create an accoun with However, I’m already using DNSimple and paying for it.

How can I proceed?