@amunizp I see you have linked a website in your profile header. However, when I follow that URL and check the source code (as Mastodon would do), I don't find a hyperlink with a rel="me" attribute to your Mastodon profile. I think that's why the URL doesn't show up green on your profile.
In other words, the website specified by the URL in the profile should contain the following HTML in your case:
<a href="https://fosstodon.org/@amunizp" rel="me">some text</a>