“If your domain is registered with another provider, you can still take advantage of Netlify’s managed DNS service by delegating your domain to Netlify.”
If you are still having issues I would contact the registrar as they will have access to the account/domain whereas no-one here (including Netlify staff) will.
The ‘dig’ command displays the current status, as I have set DigitalOcean as the nameservers at the home.pl domain registrar. Later, in the DigitalOcean control panel, I attempted to add Netlify (it only succeeded for subdomains).
However, the issue is related to setting the nameservers at the domain registrar to directly point to Netlify. When trying to do this, an error occurs. Additionally, I have attached a screenshot for reference.
My first attempts to set up these servers yesterday involved providing 4 addresses to Netlify, and later I tried other variations like 2 or 3. But even when providing all 4, the error still occurred. In any case, the most important thing is that it works now.