'Nested flexbox does not work unless bullet points from ul are showing

I'm doing a "Code Along" sort-of exercise by Colt Steele's web dev bootcamp on Udemy. Essentially, adding justify-content: space-evenly to ul { doesn't do anything; the elements within ul sit on the left. A workaround I tried was commenting out display: inline from ul, li {, which does work, but bullet points show up. I'm following on the same file I downloaded from Udemy. Can you help me find what I'm missing? Thank you! My code below: PS: This is my very first post, I hope I formatted my question the right way.

body {
    font-family: "Open Sans", sans-serif;
}

h1 {
    font-size: 6em;
    text-align: center;
}

nav {
    font-size: 1.5em;
    display: flex;
    justify-content: space-between;
}

ul {
    border: 2px solid black;
    flex: 1;
    max-width: 50%;
    display: flex;
    /* DOES NOT SPACE EVENLY */
    justify-content: space-evenly;
}

ul,
li {
    /* CONFLICTS WITH justify-content: space-evenly INSIDE ul */
    display: inline;
    margin: 0;
    padding: 0;
}

@media (max-width: 768px) {
    h1 {
        font-size: 4em;
    }
}

@media (max-width: 576px) {
    h1 {
        font-size: 3em;
    }
}
<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Media Queries</title>
    <link href="https://fonts.googleapis.com/css2?family=Open+Sans:wght@300&display=swap" rel="stylesheet">

    <link rel="stylesheet" href="starter.css">
</head>

<body>
    <nav>
        <!-- FLEXBOX PARENT START -->
        <a href="#home">Home</a>
        <ul>
            <!-- FLEXBOX CHILD START -->
            <li>
                <a href="#Home">Learn More</a>
            </li>
            <li>
                <a href="#Home">About</a>
            </li>
            <li>
                <a href="#Home">Contact</a>
            </li>
            <!-- FLEXBOX CHILD END -->
        </ul>
        <a href="#signup">Sign Up</a>
        <!-- FLEXBOX PARENT END -->
    </nav>
    <h1>Media Queries</h1>
</body>

</html>


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