https://i.sstatic.net/wo35v.jpg
I have experimented with different margin classes like ml-5 in Bootstrap 5 to create spacing.
<body>
<nav class="navbar navbar-expand navbar-dark bg-dark">
<a class="navbar-brand" href="#">Welcome</a>
<ul class="navbar-nav mr-auto">
<li class="nav-item">
<a class="nav-link" href="Signup.html">Sign In</a>
</li>
</ul>
</nav>
</body>